Pig-Head the Ravenous

Pig-Head the Ravenous enters the battlefield with
a +1/+1 counter on it for each creature in a
graveyard. If three or more +1/+1 counters are
put on Pig-Head this way, it gains vigilance,
flying, haste, and trample.
Whenever a creature would be put into a
graveyard, you may cast it. You may spend mana
as though it were mana of any color to use this
ability.
"Ever so slightly feral"