Grave of the Old Gods

When Grave of the Old Gods enters the battlefield, you gain 2 life and draw a card.
When Grave of the Old Gods would leave the battlefield because of a spell or ability control by
an opponent you may exile it instead, and if you
do create a 9/9 token called The Old God with Indestructible, and "When The Old God enters
the battlefield or attacks, target player loses life
equal to your devotion to Black and white."