Wally West, The Flash

Haste, Flash, Double strike
When this creature enters the battlefield, you may have it attack, untap, and block in one turn. This creature may attack on an opponent's turn if it didn't attack on your turn.
If this card would leave the battlefield in any way, instead exile it with 2 Speed counters. Remove one each turn, and when there are none, return it to the battlefield tapped.