Dreadswine of Kessig

Delirium -- Dreadswine of Kessig gets +4/+0
as long as there are four or more card types
among cards in your graveyard.
The tracker searching for it saw four mangled corpses
of werewolves, each one gored to death. Then he heard
an ungodly squeal behind him, and the rush of hooves.
He realized he was not going to return to the village
farmer who asked him to find his missing prized swine.