Keeper

''Note: This hero's name was changed to "Guardian" (not to be confused with the "Guardian" walking machine) in July 2020. In October 2020, it was changed back to its original name.''

Keeper was originally released as a PvP reward in seasons 18-20. With the release of the Catacombs, he can also be obtained by trading in 75 ancient data blocks, which can be obtained from the Catacombs shop at the price of 48 diary pages for 5 data blocks.

On the battlefield, Keeper uses a weapon with a long range capable of creating an effect similar to the tesla effect of Special Agent Rosenstein, although with a green glow rather than blue. Like tesla attacks, it does damage over a small area and ignores all armor and evasion of the target.

Hero experience
Keeper gains levels and skill points as follows, with a maximum level of 25.

Hero training
The benefits and costs of training Keeper at the Hall of Heroes are as follows. This does not include the effects of skins or equipment, which are detailed below. However, the last row in the table shows the maximum hero stats including all equipment at maximum level. Note that Keeper's accuracy is considered maxed, and cannot be trained further except through equipment upgrades. Upgrade costs also always include 1 skill point.

Hero skins
Keeper has two skins available:

Hero equipment
Keeper can be equipped with five pieces of equipment, with the following costs and benefits. The benefits listed are already totalled (that is, the net increase in going from level 1 to level 2 of the "Memory and Knowledge" is +25 health and +1 evasion). All costs listed are in gold.