Giga Bowser

When Giga Bowser enters the battle field you lose 3 life. Then sacrifice a creature. Then, You gain 3 life or deal 3 damage to any target.
If it's your turn, Giga Bowser has trample.
If it isn't, He has haste.
{t}: Deal 1 damage to any target and you gain 1 life.
{r}{r}, {t}: Giga Bowser has lifelink until end of turn.