Hound of the Farbogs
Shadows over Innistrad — Common
Creature — Zombie Hound
Delirium — Hound of the Farbogs has menace as long as there are four or more card types among cards in your graveyard. (A creature with menace can't be blocked except by two or more creatures.)
As you hear it baying in the distance, you'll feel its breath on your neck.