Drachenwulf

Flying.
Hexproof. This card can not be the target of
opponents spells or abilities.
Sacrifice You may exile {x} wolf or dragon
creatures in your hand ({x} = reduced mana cost).
After Drachenwulf enters the battlefield
exile your graveyard at the start of every turn.
If Drachenwulf has no +3 +3 counters on it
you may exile an allied wolf or dragon creature
on the battlefield and add a +3 +3 counter
to Drachenwulf.