Avatar, the Last Airbender

When Avatar, the Last Airbender enters the battlefield, you may pay {w}{u}{r}{g} and destroy all creatures opponents control.
Flying, trample, vigilance
{w}{u}: Regenerate Avatar, the Last Airbender.
{r}{g}: Deal 1 damage to target creature.
When we hit our lowest point, we are open to the greatest change." ~Avatar Aang