Oso, Polar Mystic

Hibernation 10 (This creature enters the battlefield
with 10 hibernation counters on it. As long as it has a
hibernation counter, this creature has hexproof, and
can't attack, or block. At the beginning of your
upkeep, remove a hibernation counter.)
Whenever a hibernation counter is removed
from a Bear you control, you gain 2 life.