Catacombs

The Catacombs are an area in your base that was made available in a September 2020 update. They are not a normal building, but a combat area; however, they are not a time-limited event, but rather are a permanent feature (rather like the enemy squads in Ardheim). The Catacombs give you a chance to test the strength of your heroes; while the early levels are not too difficult for players with some experience, the later levels will require a very strong team of top heroes. For more details, see the official post.

Overview
The Catacombs contains five levels, with each level containing 16 separate rooms arranged in 7 rows. In order to complete a level, you must progress through the rooms to defeat the boss at the top. You do not have to complete all 16 rooms in order to reach the boss; you only need to do one from each row. Indeed, once you start a fight in a room, the other rooms in that row become locked, and you have to pay gold to unlock them (50 gold on level 1, 75 gold on level 2, 100 gold on level 3, 125 gold on level 4, and 200 gold on level 5). Since the rooms are randomly populated, in general there's no reason to pick one over another.

In the Catacombs, you cannot take in regular troops. Instead, you have a team of 5 heroes and 4 supports. Like heroic mode events, the supports cannot include additional troops like Landings. If a hero is wounded in battle (even if you win the battle), he becomes unavailable to use through the rest of the Catacombs run. You can restore them by paying gold:
 * white hero: 25 gold
 * green hero: 50 gold
 * blue hero: 100 gold
 * purple hero: 150 gold
 * orange hero: 200 gold

When you start your first battle, a 24-hour timer starts. If you complete a level, the timer will restart once you start the next level. The Catacombs will reset back to their initial state at the end of the 24 hours (regardless of whether you won or not). Any wounded heroes will then be returned to normal. (Note that wounded heroes only affect your ability to use them in the Catacombs -- you can still use them normally for any other missions.)

Story
The first time that a player enters the Catacombs, they are greeted by Commander Grant. He informs the player that the Catacombs were the burial place of several soldiers from the days of the Old Empire, among them the legendary general Heinrich von Struber. As the Occult Wars took place, the tombs themselves were repurposed to develop new machines using occult technology to fight the Dominion; sadly, as the wars turned against the Empire, the machines were all forgotten and left to rust. Now, cultists of the Dark Gods have infiltrated the Catacombs, and their dark work has seen the legions of the past awakened, the machines corrupted and -- worst of all -- brought the general back! The player must gather their champions, delve into the Catacombs, and slay the dark forces rising from the graves within.

Enemies

 * Old Empire Guards are the main infantry of the undead army. At base level they are quite weak, barely better than imperial shooters, but they gain health and damage rapidly at higher levels; at top levels, they're more comparable to Phoenix defectors.
 * Suppressors of the Old Empire are the stormtroopers of the undead army. Like the infantry, they are not particularly strong at low levels, but are capable of putting out a lot of damage at higher levels.
 * The heavy infantry is provided by the Gendarme of the Old Empire. They also gain in power much more quickly than a typical units; while a base-level Gendarme is less powerful than a base-level Crusader, a level 10 Gendarme is significantly more powerful than a level 10 Crusader.
 * Black Knights of the Old Empire are the first special unit of the undead army. They fight at melee range, and are pretty slow, so they are not too much of a threat at lower levels. At higher levels they have high evasion and armor ratings, though, which makes them quite difficult to bring down.
 * Necromancers are the other special unit, and by far the most dangerous enemy in the undead army. They have a powerful long-range occult attack (like Sorcerer Khigna) which does area damage, ignoring armor and evasion. Higher-level necromancers also have annoyingly high levels of evasion, making them difficult to eliminate quickly.

Obelisks
Most rooms in the Catacombs will contain one or more occult obelisks. These give various benefits to the enemy troops, and destroying them will remove these benefits, as follows:
 * Red obelisk: +50 damage
 * Green obelisk: +100 health
 * Yellow obelisk: +10 evasion
 * Blue obelisk: +5 armor

There is also some suggestion that the obelisks give various boosts to the boss at the end of each level, but this is not yet confirmed or understood.

Rewards
Defeating the boss of each level will give you diary pages, which can be redeemed for new skins or hero tokens in the Catacombs shop. Level 1 gives you two diary pages, levels 2 and 3 three diary pages, level 4 four diary pages, and level 5 a whopping 10 diary pages.

Shop
The items in the shop include new skins and equipment, as well as tokens for heroes (both some that you can already obtain from the Quartermaster, and some new ones that can only be obtained here).

Level information
In all regular rooms, you can take 5 heroes and 4 supports (not including drop supports like Landings). For the first two boss rooms (the last room on each level), you can bring 5 heroes and 8 supports instead; the last two boss rooms are the standard 4 supports. All Catacombs rooms cost 100 fuel to run. Note that in the Catacombs, you cannot win merely by capturing the enemy spawn point; you must destroy all enemies to prevail.

All rooms contain at least one "hero" enemy, as well as various regular troops. The different rooms in the same row all have the same name, and the enemy squads are always chosen at random from the possibilities below for the row, regardless of which specific map in a row you are on.

The reward for completing a level is always a single ordinary chest, except when noted otherwise below.

Note: In the initial release of the event, several of these rooms (1.4, 4.2, and 4.3) had bugged enemy lineups, which would cause you to be unable to complete these rooms even if you killed all enemies. As of the October 20th release, these should be fixed. There are still occasional issues of Blitz dying for no reason in rooms 1.1 and 2.1, so try to avoid using him there.

Level 1
Memorial hall (bottom)
 * Enemies: 1x Tomb keeper L0, 3x Old Empire Guards L0, 3x Suppressors of the Old Empire L0, 2x Gendarme of the Old Empire L0, 2x Necromancer L0, 2x Black Knights of the Old Empire L0
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Dark tunnels (2nd row)
 * Enemies 1: 1x Stone guard L2, 3x Old Empire Guards L2, 3x Suppressors of the Old Empire L2, 2x Gendarme of the Old Empire L2, 2x Necromancer L2, 3x Black Knights of the Old Empire L2
 * Enemies 2: 1x Tomb keeper L1, 4x Old Empire Guards L1, 3x Suppressors of the Old Empire L1, 2x Gendarme of the Old Empire L1, 2x Necromancer L1, 3x Black Knights of the Old Empire L1
 * Possible enemy obelisks: 4x Yellow Obelisk

Destroyed sanctuary (3rd row)
 * Enemies 1: 1x Tomb keeper L1, 3x Old Empire Guards L2, 2x Suppressors of the Old Empire L2, 2x Gendarme of the Old Empire L2, 1x Necromancer L2, 2x Black Knights of the Old Empire L2
 * Enemies 2: 1x Tomb keeper L2, 3x Old Empire Guards L2, 2x Suppressors of the Old Empire L1, 2x Gendarme of the Old Empire L2, 1x Necromancer L2, 2x Black Knights of the Old Empire L2
 * Enemies 3: 1x Stone guard L2, 2x Old Empire Guards L2, 3x Suppressors of the Old Empire L2, 1x Gendarme of the Old Empire L2, 1x Necromancer L1, 2x Black Knights of the Old Empire L2
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Burial hall (4th row)
 * Enemies 1: 1x Tomb keeper L2, 4x Old Empire Guards L2, 3x Suppressors of the Old Empire L2, 2x Gendarme of the Old Empire L2, 2x Necromancer L2, 2x Black Knights of the Old Empire L2
 * Enemies 2: 1x Stone guard L2, 2x Old Empire Guards L2, 4x Suppressors of the Old Empire L2, 2x Gendarme of the Old Empire L2, 2x Necromancer L2, 3x Black Knights of the Old Empire L2
 * Enemies 3: 1x Tomb keeper L2, 4x Old Empire Guards L2, 2x Suppressors of the Old Empire L2, 1x Gendarme of the Old Empire L2, 2x Necromancer L2, 1x Stone guard L2
 * Enemies 4: 1x Stone guard L2, 3x Old Empire Guards L2, 3x Suppressors of the Old Empire L2, 1x Gendarme of the Old Empire L2, 1x Necromancer L2
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Sacred memorial (5th row)
 * Enemies 1: 1x Tomb keeper L4, 3x Old Empire Guards L4, 3x Suppressors of the Old Empire L4, 2x Gendarme of the Old Empire L4, 2x Necromancer L4, 1x Black Knights of the Old Empire L4
 * Enemies 2: 1x Stone guard L4, 3x Old Empire Guards L4, 4x Suppressors of the Old Empire L4, 1x Gendarme of the Old Empire L4, 1x Necromancer L4, 1x Black Knights of the Old Empire L4
 * Enemies 3: 1x Tomb keeper L4, 4x Old Empire Guards L4, 3x Suppressors of the Old Empire L4, 1x Gendarme of the Old Empire L4, 2x Necromancer L4, 2x Black Knights of the Old Empire L4, 1x Tomb keeper L4
 * Possible enemy obelisks: 1x Green Obelisk, 1x Blue Obelisk

Veteran's tomb (6th row)
 * Enemies 1: 1x Tomb keeper L4, 3x Old Empire Guards L4, 5x Suppressors of the Old Empire L4, 2x Gendarme of the Old Empire L4, 2x Necromancer L4, 3x Black Knights of the Old Empire L4, 1x Stone guard L4
 * Enemies 2: 1x Stone guard L5, 3x Old Empire Guards L4, 3x Suppressors of the Old Empire L4, 3x Gendarme of the Old Empire L4, 2x Necromancer L4, 2x Black Knights of the Old Empire L4
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

General's burial vault (top)
 * Enemies: 1x General Heinrich von Stofer L2, 4x Old Empire Guards L4, 3x Suppressors of the Old Empire L4, 2x Gendarme of the Old Empire L4, 1x Necromancer L4, 1x Stone guard L4, 1x Tomb keeper L4

Level 2
Memorial hall (bottom)
 * Enemies: 1x Tomb keeper L3, 5x Old Empire Guards L4, 2x Suppressors of the Old Empire L4, 1x Gendarme of the Old Empire L4, 2x Necromancer L4, 3x Black Knights of the Old Empire L4, 1x Stone guard L4
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Dark tunnels (2nd row)
 * Enemies 1: 1x Stone guard L5, 5x Old Empire Guards L5, 4x Suppressors of the Old Empire L5, 2x Gendarme of the Old Empire L5, 2x Necromancer L5, 3x Black Knights of the Old Empire L5
 * Enemies 2: 1x Tomb keeper L5, 2x Old Empire Guards L5, 5x Suppressors of the Old Empire L5, 2x Gendarme of the Old Empire L5, 1x Necromancer L5, 2x Black Knights of the Old Empire L5, 1x Stone guard L6
 * Possible enemy obelisks: 4x Yellow Obelisk

Destroyed sanctuary (3rd row)
 * Enemies 1: 1x Stone guard L5, 4x Old Empire Guards L5, 4x Suppressors of the Old Empire L5, 3x Gendarme of the Old Empire L5, 3x Necromancer L5, 3x Black Knights of the Old Empire L5, 1x Tomb keeper L5
 * Enemies 2: 1x Stone guard L5, 3x Old Empire Guards L5, 4x Suppressors of the Old Empire L5, 2x Gendarme of the Old Empire L5, 2x Necromancer L5, 3x Black Knights of the Old Empire L5, 1x Tomb keeper L5
 * Enemies 3: 1x Tomb keeper L4, 4x Old Empire Guards L5, 2x Suppressors of the Old Empire L5, 3x Gendarme of the Old Empire L5, 2x Necromancer L5, 3x Black Knights of the Old Empire L5
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Burial hall (4th row)
 * Enemies 1: 1x Stone guard L6, 3x Old Empire Guards L5, 2x Suppressors of the Old Empire L5, 5x Gendarme of the Old Empire L5, 2x Necromancer L5, 3x Black Knights of the Old Empire L5, 1x Tomb keeper L5
 * Enemies 2: 1x Tomb keeper L6, 4x Old Empire Guards L5, 3x Suppressors of the Old Empire L5, 2x Gendarme of the Old Empire L5, 2x Necromancer L5, 3x Black Knights of the Old Empire L5, 1x Stone guard L5
 * Enemies 3: 1x Stone guard L6, 3x Old Empire Guards L5, 4x Suppressors of the Old Empire L5, 2x Gendarme of the Old Empire L5, 2x Necromancer L5, 3x Black Knights of the Old Empire L5
 * Enemies 4: 1x Tomb keeper L6, 5x Old Empire Guards L5, 3x Suppressors of the Old Empire L5, 2x Gendarme of the Old Empire L5, 1x Necromancer L5, 3x Black Knights of the Old Empire L5, 1x Stone guard L5
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Sacred memorial (5th row)
 * Enemies 1: 1x Stone guard L6, 4x Old Empire Guards L6, 4x Suppressors of the Old Empire L6, 3x Gendarme of the Old Empire L6, 3x Necromancer L6, 3x Black Knights of the Old Empire L6
 * Enemies 2: 1x Tomb keeper L6, 3x Old Empire Guards L6, 2x Suppressors of the Old Empire L6, 1x Gendarme of the Old Empire L6, 2x Necromancer L6, 5x Black Knights of the Old Empire L6, 1x Stone guard L6
 * Enemies 3: 1x Stone guard L6, 5x Old Empire Guards L6, 3x Suppressors of the Old Empire L6, 3x Gendarme of the Old Empire L6, 3x Necromancer L6, 2x Black Knights of the Old Empire L6
 * Possible enemy obelisks: 1x Green Obelisk, 1x Blue Obelisk

Veteran's tomb (6th row)
 * Enemies 1: 1x Stone guard L7, 3x Old Empire Guards L7, 4x Suppressors of the Old Empire L7, 2x Gendarme of the Old Empire L7, 3x Necromancer L7, 4x Black Knights of the Old Empire L7
 * Enemies 2: 1x Tomb keeper L7, 4x Old Empire Guards L7, 5x Suppressors of the Old Empire L7, 2x Gendarme of the Old Empire L7, 4x Necromancer L7, 3x Black Knights of the Old Empire L7
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Hideout of Steel Octopus (top)
 * Enemies: 1x Steel Octopus L1, 4x Old Empire Guards L7, 4x Suppressors of the Old Empire L7, 2x Gendarme of the Old Empire L7, 2x Necromancer L7, 3x Black Knights of the Old Empire L7
 * Reward: 2 ordinary chests

The Steel Octopus behaves like a convoy boss, although it has only 15100 HP. It also features an auxiliary machine gun position, which has its own separate HP pool and can be destroyed separately, like turrets on other convoys (although its health bar is not visible). Once you destroy the Steel Octopus, you win the level, even if other enemy units remain on the board (as in a normal convoy).

Level 3
Memorial hall (bottom)
 * Enemies: 1x Tomb keeper L7, 3x Old Empire Guards L7, 5x Suppressors of the Old Empire L7, 3x Gendarme of the Old Empire L7, 3x Necromancer L7, 4x Black Knights of the Old Empire L7, 1x Stone guard L7
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Dark tunnels (2nd row)
 * Enemies 1: 1x Stone guard L7, 4x Old Empire Guards L7, 5x Suppressors of the Old Empire L7, 4x Gendarme of the Old Empire L7, 3x Necromancer L7, 4x Black Knights of the Old Empire L7
 * Enemies 2: 1x Tomb keeper L7, 5x Old Empire Guards L7, 4x Suppressors of the Old Empire L7, 2x Gendarme of the Old Empire L7, 4x Necromancer L7, 3x Black Knights of the Old Empire L7
 * Possible enemy obelisks: 4x Yellow Obelisk

Destroyed sanctuary (3rd row)
 * Enemies 1: 1x Stone guard L8, 6x Old Empire Guards L8, 5x Suppressors of the Old Empire L8, 3x Gendarme of the Old Empire L8, 4x Necromancer L8, 3x Black Knights of the Old Empire L8
 * Enemies 2: 1x Tomb keeper L8, 4x Old Empire Guards L8, 3x Suppressors of the Old Empire L8, 5x Gendarme of the Old Empire L8, 2x Necromancer L8, 4x Black Knights of the Old Empire L8
 * Enemies 3: 1x Stone guard L8, 6x Old Empire Guards L8, 5x Suppressors of the Old Empire L8, 3x Gendarme of the Old Empire L8, 2x Necromancer L8, 4x Black Knights of the Old Empire L8, 1x Tomb keeper L8
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Burial hall (4th row)
 * Enemies 1: 1x Tomb keeper L8, 7x Old Empire Guards L8, 2x Suppressors of the Old Empire L8, 5x Gendarme of the Old Empire L8, 3x Necromancer L8, 5x Black Knights of the Old Empire L8
 * Enemies 2: 1x Stone guard L8, 3x Old Empire Guards L8, 3x Suppressors of the Old Empire L8, 4x Gendarme of the Old Empire L8, 1x Necromancer L8, 7x Black Knights of the Old Empire L8
 * Enemies 3: 1x Tomb keeper L8, 6x Old Empire Guards L8, 6x Suppressors of the Old Empire L8, 5x Gendarme of the Old Empire L8, 2x Necromancer L8, 3x Black Knights of the Old Empire L8, 1x Stone guard L8
 * Enemies 4: 1x Stone guard L8, 7x Old Empire Guards L8, 7x Suppressors of the Old Empire L8, 5x Gendarme of the Old Empire L8, 4x Necromancer L8, 4x Black Knights of the Old Empire L8, 1x Tomb keeper L8
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Sacred memorial (5th row)
 * Enemies 1: 1x Tomb keeper L9, 3x Old Empire Guards L9, 7x Suppressors of the Old Empire L9, 3x Gendarme of the Old Empire L9, 5x Necromancer L9, 3x Black Knights of the Old Empire L9, 1x Stone guard L9
 * Enemies 2: 1x Tomb keeper L9, 5x Old Empire Guards L9, 7x Suppressors of the Old Empire L9, 2x Gendarme of the Old Empire L9, 3x Necromancer L9, 5x Black Knights of the Old Empire L9
 * Enemies 3: 1x Tomb keeper L9, 8x Old Empire Guards L9, 5x Suppressors of the Old Empire L9, 3x Gendarme of the Old Empire L9, 5x Necromancer L9, 6x Black Knights of the Old Empire L9
 * Possible enemy obelisks: 1x Green Obelisk, 1x Blue Obelisk

Veteran's tomb (6th row)
 * Enemies 1: 1x Stone guard L10, 6x Old Empire Guards L10, 8x Suppressors of the Old Empire L10, 5x Gendarme of the Old Empire L10, 4x Necromancer L10, 6x Black Knights of the Old Empire L10, 1x Tomb keeper L10
 * Enemies 2: 1x Tomb keeper L10, 5x Old Empire Guards L10, 8x Suppressors of the Old Empire L10, 4x Gendarme of the Old Empire L10, 3x Necromancer L10, 8x Black Knights of the Old Empire L10
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Sanctuary of Child of Horror (top)
 * Enemies: 1x "Spider" walking machine (Infant) L1, 4x Old Empire Guards L10, 5x Suppressors of the Old Empire L10, 1x Gendarme of the Old Empire L10, 2x Necromancer L10, 3x Black Knights of the Old Empire L10
 * Reward: Rare chest

Like the Steel Octopus, the Infant Spider is like a convoy boss, with 30500 HP.

Level 4
Memorial hall (bottom)
 * Enemies: 1x Stone guard L10, 8x Old Empire Guards L10, 8x Suppressors of the Old Empire L10, 6x Gendarme of the Old Empire L10, 4x Necromancer L10, 4x Black Knights of the Old Empire L10
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Dark tunnels (2nd row)
 * Enemies 1: 1x Tomb keeper L10, 10x Old Empire Guards L10, 7x Suppressors of the Old Empire L10, 8x Gendarme of the Old Empire L10, 5x Necromancer L10, 7x Black Knights of the Old Empire L10, 1x Stone guard L10
 * Enemies 2: 1x Stone guard L12, 15x Old Empire Guards L12, 10x Suppressors of the Old Empire L12, 8x Necromancer L12, 6x Gendarme of the Old Empire L12, 8x Black Knights of the Old Empire L12, 1x Tomb keeper L12
 * Possible enemy obelisks: 4x Yellow Obelisk

Destroyed sanctuary (3rd row)
 * Enemies 1: 1x Tomb keeper L12, 10x Old Empire Guards L12, 10x Necromancer L12, 10x Black Knights of the Old Empire L12, 10x Gendarme of the Old Empire L12
 * Enemies 2: 1x Stone guard L12, 10x Black Knights of the Old Empire L12, 10x Suppressors of the Old Empire L12, 10x Old Empire Guards L12, 10x Gendarme of the Old Empire L12, 10x Necromancer L12
 * Enemies 3: 1x Tomb keeper L12, 10x Gendarme of the Old Empire L12, 10x Black Knights of the Old Empire L12, 10x Old Empire Guards L12, 10x Suppressors of the Old Empire L12, 10x Necromancer L12
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Burial hall (4th row)
 * Enemies 1: 1x Stone guard L12, 10x Old Empire Guards L12, 12x Suppressors of the Old Empire L12, 10x Gendarme of the Old Empire L12, 16x Necromancer L12, 10x Black Knights of the Old Empire L12
 * Enemies 2: 1x Tomb keeper L12, 10x Old Empire Guards L12, 15x Suppressors of the Old Empire L12, 15x Gendarme of the Old Empire L12, 20x Necromancer L12, 10x Black Knights of the Old Empire L12
 * Enemies 3: 1x Stone guard L12, 15x Old Empire Guards L12, 16x Suppressors of the Old Empire L12, 14x Gendarme of the Old Empire L12, 10x Necromancer L9, 12x Black Knights of the Old Empire L12
 * Enemies 4: 1x Tomb keeper L12, 12x Old Empire Guards L12, 15x Suppressors of the Old Empire L12, 10x Gendarme of the Old Empire L12, 15x Necromancer L12, 10x Black Knights of the Old Empire L12
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Sacred memorial (5th row)
 * Enemies 1: 1x Stone guard L12, 15x Old Empire Guards L12, 15x Suppressors of the Old Empire L12, 12x Gendarme of the Old Empire L12, 15x Necromancer L12, 20x Black Knights of the Old Empire L12
 * Enemies 2: 1x Tomb keeper L12, 15x Old Empire Guards L12, 15x Suppressors of the Old Empire L12, 10x Gendarme of the Old Empire L12, 15x Necromancer L12, 20x Black Knights of the Old Empire L12
 * Enemies 3: 1x Stone guard L12, 20x Old Empire Guards L12, 15x Suppressors of the Old Empire L12, 15x Gendarme of the Old Empire L12, 10x Necromancer L12, 20x Black Knights of the Old Empire L12, 1x Tomb keeper L12
 * Possible enemy obelisks: 1x Green Obelisk, 1x Blue Obelisk

Veteran's tomb (6th row)
 * Enemies 1: 1x Stone guard L12, 20x Old Empire Guards L12, 15x Suppressors of the Old Empire L12, 15x Gendarme of the Old Empire L12, 15x Necromancer L12, 25x Black Knights of the Old Empire L12
 * Enemies 2: 1x Tomb keeper L12, 15x Old Empire Guards L12, 20x Suppressors of the Old Empire L12, 15x Gendarme of the Old Empire L12, 15x Necromancer L12, 20x Black Knights of the Old Empire L12, 1x Stone guard L12
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Lair of the Dark Gods (top)
 * Enemies: 1x Final Boss L1, 20x Old Empire Guards L12, 20x Suppressors of the Old Empire L12, 20x Gendarme of the Old Empire L12, 20x Necromancer L12, 20x Black Knights of the Old Empire L12
 * Reward: Special chest

The final boss has 100,000 HP (which may be higher if there were obelisks that you didn't destroy), and is accompanied by two side guns, each with approximately 20,000 HP. It can do an impressive amount of damage, so make sure that you are able to handle this!

Level 5
The 5th level was introduced in the November 7, 2020 Catacombs update. It serves as a "Heroic mode" for the Catacombs, featuring new enemies.

Memorial hall (HM) (bottom)
 * Enemies: 1x Stone guard L12, 4x Old Empire Guards L12, 3x Suppressors of the Old Empire L12, 3x Gendarme of the Old Empire L12, 2x Necromancer L12, 2x Black Knights of the Old Empire L12, 5x Treacherous Tomb Raiders L10, 2x Avid Ghost Hunter L10, 5x Enraged Underground Furies L10, 4x Fearsome dungeon vandals L10
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Dark tunnels (HM) (2nd row)
 * Enemies 1: 1x Tomb keeper L12, 4x Old Empire Guards L12, 3x Suppressors of the Old Empire L12, 3x Gendarme of the Old Empire L12, 3x Necromancer L12, 2x Black Knights of the Old Empire L12, 1x Stone guard L12, 3x Treacherous Tomb Raiders L12, 5x Avid Ghost Hunter L12, 4x Enraged Underground Furies L12, 3x Fearsome dungeon vandals L12
 * Enemies 2: 1x Stone guard L12, 7x Old Empire Guards L12, 5x Suppressors of the Old Empire L12, 4x Necromancer L12, 3x Gendarme of the Old Empire L12, 4x Black Knights of the Old Empire L12, 1x Tomb keeper L12, 3x Treacherous Tomb Raiders L12, 4x Avid Ghost Hunter L12, 2x Enraged Underground Furies L12, 3x Fearsome dungeon vandals L12
 * Possible enemy obelisks: 4x Yellow Obelisk

Destroyed sanctuary (HM) (3rd row)
 * Enemies 1: 1x Tomb keeper L12, 5x Old Empire Guards L12, 5x Necromancer L12, 5x Black Knights of the Old Empire L12, 5x Gendarme of the Old Empire L12, 7x Treacherous Tomb Raiders L15, 6x Avid Ghost Hunter L15, 8x Enraged Underground Furies L15, 6x Fearsome dungeon vandals L15
 * Enemies 2: 1x Stone guard L12, 5x Black Knights of the Old Empire L12, 5x Suppressors of the Old Empire L12, 6x Old Empire Guards L12, 4x Gendarme of the Old Empire L12, 3x Necromancer L12, 4x Treacherous Tomb Raiders L15, 5x Avid Ghost Hunter L15, 5x Enraged Underground Furies L15, 6x Fearsome dungeon vandals L15
 * Enemies 3: 1x Tomb keeper L12, 5x Gendarme of the Old Empire L12, 5x Black Knights of the Old Empire L12, 4x Old Empire Guards L12, 6x Suppressors of the Old Empire L12, 4x Necromancer L12, 5x Treacherous Tomb Raiders L15, 3x Avid Ghost Hunter L15, 4x Enraged Underground Furies L15, 3x Fearsome dungeon vandals L15
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Burial hall (HM) (4th row)
 * Enemies 1: 1x Stone guard L12, 6x Old Empire Guards L12, 7x Suppressors of the Old Empire L12, 6x Gendarme of the Old Empire L12, 8x Necromancer L12, 5x Black Knights of the Old Empire L12, 5x Treacherous Tomb Raiders L11, 5x Avid Ghost Hunter L15, 6x Enraged Underground Furies L15, 4x Fearsome dungeon vandals L15
 * Enemies 2: 1x Tomb keeper L12, 5x Old Empire Guards L12, 7x Suppressors of the Old Empire L12, 7x Gendarme of the Old Empire L12, 8x Necromancer L12, 4x Black Knights of the Old Empire L12, 4x Treacherous Tomb Raiders L15, 6x Avid Ghost Hunter L15, 5x Enraged Underground Furies L15, 4x Fearsome dungeon vandals L15
 * Enemies 3: 1x Stone guard L12, 7x Old Empire Guards L12, 7x Suppressors of the Old Empire L12, 7x Gendarme of the Old Empire L12, 5x Necromancer L12, 6x Black Knights of the Old Empire L12, 5x Treacherous Tomb Raiders L15, 4x Avid Ghost Hunter L15, 6x Enraged Underground Furies L15, 5x Fearsome dungeon vandals L15
 * Enemies 4: 1x Tomb keeper L12, 6x Old Empire Guards L12, 7x Suppressors of the Old Empire L12, 5x Gendarme of the Old Empire L12, 7x Necromancer L12, 5x Black Knights of the Old Empire L12, 6x Treacherous Tomb Raiders L15, 5x Avid Ghost Hunter L15, 4x Enraged Underground Furies L15, 5x Fearsome dungeon vandals L15
 * Possible enemy obelisks: 1x Red Obelisk, 1x Green Obelisk

Sacred memorial (HM) (5th row)
 * Enemies 1: 1x Stone guard L12, 5x Old Empire Guards L12, 4x Suppressors of the Old Empire L12, 5x Gendarme of the Old Empire L12, 5x Necromancer L12, 5x Black Knights of the Old Empire L12, 5x Avid Ghost Hunter L15, 7x Enraged Underground Furies L15, 4x Fearsome dungeon vandals L15, 5x Avid Ghost Hunter L15
 * Enemies 2: 1x Tomb keeper L12, 7x Old Empire Guards L12, 4x Suppressors of the Old Empire L12, 5x Gendarme of the Old Empire L12, 7x Necromancer L12, 8x Black Knights of the Old Empire L12, 7x Treacherous Tomb Raiders L15, 4x Avid Ghost Hunter L15, 5x Enraged Underground Furies L15, 6x Fearsome dungeon vandals L15
 * Enemies 3: 1x Stone guard L12, 5x Old Empire Guards L12, 7x Suppressors of the Old Empire L12, 7x Gendarme of the Old Empire L12, 5x Necromancer L12, 10x Black Knights of the Old Empire L12, 1x Tomb keeper L12, 7x Treacherous Tomb Raiders L15, 8x Avid Ghost Hunter L15, 5x Enraged Underground Furies L15, 6x Fearsome dungeon vandals L15
 * Possible enemy obelisks: 1x Green Obelisk, 1x Blue Obelisk

Veteran's tomb (HM) (6th row)
 * Enemies 1: 1x Stone guard L12, 10x Old Empire Guards L12, 6x Suppressors of the Old Empire L12, 7x Gendarme of the Old Empire L12, 9x Necromancer L12, 8x Black Knights of the Old Empire L12, 7x Treacherous Tomb Raiders L15, 10x Avid Ghost Hunter L15, 8x Enraged Underground Furies L15, 5x Fearsome dungeon vandals L15
 * Enemies 2: 1x Tomb keeper L12, 7x Old Empire Guards L12, 10x Suppressors of the Old Empire L12, 7x Gendarme of the Old Empire L12, 7x Necromancer L12, 10x Black Knights of the Old Empire L12, 1x Stone guard L12, 6x Treacherous Tomb Raiders L15, 7x Avid Ghost Hunter L15, 8x Enraged Underground Furies L15, 10x Fearsome dungeon vandals L15
 * Possible enemy obelisks: 1x Green Obelisk, 1x Yellow Obelisk

Lair of the Dark Gods (HM) (top)
 * Enemies: 1x Heroic Final Boss L1, 8x Old Empire Guards L12, 10x Suppressors of the Old Empire L12, 7x Gendarme of the Old Empire L12, 7x Necromancer L12, 8x Black Knights of the Old Empire L12, 8x Treacherous Tomb Raiders L15, 7x Avid Ghost Hunter L15, 8x Enraged Underground Furies L15, 7x Fearsome dungeon vandals L15
 * Reward: Special chest

The final boss is the same as the regular final boss, with approximately 100,000 HP (depending on obelisks you destroyed) and two side guns, each with approximately 20,000 HP.