Sun-bursting Evergreens

({t}: Add {g} or {w} to your mana pool.)
As Sun-bursting Evergreens enters the battlefield, you may discard a card from your
hand. If you do not, it enters the battlefield tapped.
{t}, pay 1 life, Sacrifice Sun-bursting Evergreeens: Add {g/w}{g/w} to your mana pool.