Gaiara, Essence of Life

Indestructible
As long as your devotion to green, white, and
blue is less than ten, Gaiara isn't a creature.
Whenever a creature you control with a +1/+1
counter on it deals combat damage to a player,
you gain life equal to its power.
{3}{w}{u}{g}: Put a +1/+1 counter on target
creature you control. Then, if that creature has
five or more +1/+1 counters on it, double the
number of +1/+1 counters on it instead.