Shiroi, The Exalted One

Whenever you gain life, you put +1/+1 counters
on Shiroi, The Exalted One.
{w}{w}{w}: Creatures you control gain lifelink until
the end of the turn. Shiroi will not be able to gain lifelink.
{b}{b}{b}: Sacrifice a creature: Put X +1/+1 counter
on Shiroi, The Exalted One, where X is the
creatures power and toughness.