Qwilfish

Qwilfish can't have -1/-1 counters placed on it.
Discard a card: Qwilfish gets -2/+2 and gains
infect until end of turn. Creatures you opponents
control get -1/-0 until end of turn.
Sacrifice Qwilfish: Put two -1/-1 counters on each attacking or blocking creature that are nonartifact
and are not both black and green.