Midnight Mightyena

Odor Sleuth - At the beginning of combat on each
turn and until the end of combat each turn, your opponents and permanents your opponents
control with hexproof can be the targets of spells
and abilities you control as though they didn't
have hexproof.
Growl — Whenever Midnight Mightyena attacks, target creature an opponent controls gets -1/-0
until end of turn.