Karl Gustav

Karl Gustav can be obtained by trading in 75 Artillery Regiment Patches. These in turn can be obtained by trading in Arachnophobia (Black Widow mech. brigade) or Spider Exterminator (Spider mech. brigade) convoy tokens, at the rate of 3 tokens for 1 patch, or at the Catacombs shop at the price of 42 diary pages for 5 patches.

Given his role as artillery chief, his name is probably a reference to the famous Carl Gustaf anti-tank gun.

Karl Gustav is an unusual hero, in that he doesn't carry a regular weapon. Rather, he triggers artillery bombardments on enemy units, similarly to the artillery bombardment support, although shorter and more precise. He has a very low rate of fire, though, so he is not very effective as an unsupported unit.

Hero experience
Karl Gustav gains levels and skill points as follows, with a maximum level of 30.

Hero training
The benefits and costs of training Karl Gustav 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. Upgrade costs also always include 1 skill point.

Hero skins
Karl Gustav has two skins available:

Hero equipment
Karl Gustav 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 Uniform Artillery Cap is +10 health). All costs listed are in gold.