crypt of life

{t}{b}{b}{g} draw a card
{t}{b}{b}{b}{b}{b}{g}{g}{g} you gain 4 life
{t}{b}{g}{g}{g}{g}{b} target creature gets +3 +3
{t}{b}{b}{b}{b}{b}{g}{g}{g}{g}target
creature gets +10 -10
{t}{b}{b}{b}{b}{b}{b}{g}{g}{g} target creature gets +{x} +{x}by how much
health you have