Princess Celestia

Flying
When Celestia enters the battlefield, all other
players become your friend, then choose up to
six cards you own from outside the game that
have a Sun in its art and exile them. You may
cast those cards as long as they remain exiled,
and your friends may cast them with your
permission.
{6}: Transform Celestia. Anypony may activate
this ability or help pay the cost. Any player
that doesn't becomes your enemy.