Laboratory

Sacrifice X Warpstone tokens where X is target creature you control's power: Roll a d6. On an odd number, that creature gains +X/+0 until end of
turn and trample. On an even number that creature deals damage equal to its power to any target, then sacrifice that creature.

"Although Clan Moulder's Hell Pit is the largest facility of its kind, many Skaven clans have laboratories dotted throughout the Under-Empire."