Hall of Corruption

Horror creatures you control get +1/+1.
Sacrifice a Horror: Up to three target creatures
get -1/-1 until end of turn.
"Any of those who step foot in the Haltimulicrum will witness a pain beyond human understanding.. to be torn and flayed without remorse, broken and mutated into the very essence of the Cannibrae sickness."
- Saracine, Researcher