Summon Skeletons - Activate to summon 1 Skeleton Warrior with its Unholy Armor enabled. Needs to
have gathered 2000 life points from corpses first. Skeleton Warriors have the same upgrade level as
the unit itself. Reusable every 30 seconds.
Corpse Gathering - Harvests energy from nearby corpses equal to their former maximum life points to
enable the summoning of skeletons.