Quick Ball

This spell costs {2} less to cast if you haven't
attacked with a creature during the game.
When Quick Ball enters the battlefield reveal
cards until you reveal a creature, exile that
creature facedown under this card. Put the other revealed cards onto the bottom of your library in
a random order.
{1}{t}, You may cast a creature spell exiled with
this card this turn. When that card would leave
play, return it to exile facedown.