Cisco, the Eternally Hungry

{1}{b}{b}, {t}: Exile target creature with toughness
less than Cisco's toughness. Put X +1/+1
counters on Cisco, where X is the exiled
creature's toughness.
Remove X +1/+1 counters from Cisco: Remove a creature exiled with Cisco with toughness X to its owners' graveyard. Gain X life.
When Cisco leaves the battlefield, return all creatures exiled with Cisco to their owners' graveyards.