Grimhilde, Wicked Old Hag

Whenever a player sacrifices a Food token, you may place a Poison Apple Counter on target creature and tap it.

Creatures with Poison Apple Counters don’t untap until the counter is removed.

At the beginning of your upkeep, put a -1/-1 counter on each creature with a Poison Apple Counter.

{3}: Remove a Poison Apple Counter. Any player may activate this ability as a Sorcery.