Drinker of Sorrow
{2}{B}
Creature -- Horror
5/3
~this~ can't block.
Whenever ~this~ deals combat damage, sacrifice a permanent.
Greater Harvester
{2}{B}{B}{B}
Creature -- Horror
5/6
At the beginning of your upkeep, sacrifice a permanent.
Whenever ~this~ deals combat damage to a player, that player sacrifices two permanents of their choice.
Perilous Research
{1}{U}
Instant
Draw two cards, then sacrifice a permanent.