Double Rainbow

Double Rainbows enters the battlefield tapped.
When Double Rainbows enters the battlefield, you gain 2 life.
{t}: Add {w}{u}{b}{r}{g} to your mana pool.
"What about that third faint bow near the sun?"
"That's, uh, my promise never to destroy the earth's ecosystem again by making raccoons immortal. Sorry for doing that a little while back."