Xarth, the Blade of Justice

Vigilance, First Strike, Flying
{r}: Flip a coin. If you win the flip, draw two
cards. If you lose the flip, discard one card.
{w}{r}: Flip a coin. If you win, all creatures you
control gain +3/+3 until end of turn. If you fail,
exile all creatures you control. Return those
cards to the Battlefield, at the beginning of the
next end step. Activate only on your turn