Hezrou {5}{B}{B}
Creature — Frog Demon
Whenever one or more creatures you control become blocked, each blocking creature gets -1/-1 until end of turn.
6/6
----
Demonic Stench {B}
Instant — Adventure
Each creature that blocked this turn gets -1/-1 until end of turn. (Then exile this card. You may cast the creature later from exile.)