Haemonculi, Master of Pain

Venom
Remove a -1/-1 counter from a creature: Draw
a card.
Remove a -1/-1 counter from a creature: Target creature gets -3/-3 until end turn.
Sacrifice a creature you control: Put a -1/-1
counter on target creature.
"Realspace is a banquet, turned rotten by passage of
aeons. Still, delectable sweetmeats remain there for the taking if one knows where to find them..."