Rubber Soul

Infect, Devour 1 (As this enters the battlefield, you may sacrifice any number of creatures. This creature enters the battlefield with that many +1/+1 counters on it.)
When a creature dealt damage by Rubber Soul this turn dies, put a +1/+1 counter on Rubber Soul.
{g}{b}: Rubber Soul Gains the creature type of target creature in addition to its other types. Rubber Soul may only copy the creature type of one card at a time using this ability.