Sporian Rot Hound

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
Graft 2 (This creature comes into play with two +1/+1 counters on it. Whenever another creature comes into play, you may move a +1/+1 counter from this creature onto it.)
Whether it's flesh or fungus, a hound is a man's best friend.