Desperate Measures

Whenever a creature attacks you, sacrifice a non-Horror creature you control. Create a Horror creature token with the sacrificed creature's power and toughness, then put a +1/+1 counter on it.
When you only control Horror creatures, sacrifice Desperate Measures.
Hans may have added far too much newt into the potion, but the lhurgoyf pounding at the door reinforced his decision to pass it around as is.