Ravenous Squirrel

贪食松鼠 (Ravenous Squirrel) (zhs)

Creature - Squirrel | Power/Toughness: 1 / 1 (CMC 1)
Whenever you sacrifice an artifact or creature, put a +1/+1 counter on Ravenous Squirrel.
, Sacrifice an artifact or creature: You gain 1 life and draw a card.