The Loathsome Dung Eater

Afflict 2 (Whenever this creature becomes blocked, defending player loses 2 life.)

Whenever a creature dealt damage by Dung
Eater dies, exile it. It's controller loses 1 life and
you create a Seedbed Curse token. (A Seedbed
Curse token is an artifact with "{3}, {t}, Sacrifice this artifact: Put a +1/+1 counter on target creature you control, then put a -1/-1 counter on up to one target creature you don't control.")