Cait Sith, Fortune Teller

Legendary Artifact Creature — Cat Moogle

Lucky Slots — At the beginning of combat on your turn, scry 1, then exile the top card of your library. You may play that card this turn. When you exile a card this way, target creature you control gets +X/+0 until end of turn, where X is that card's mana value.

"I'm friend to one and all, thanks to my crystal ball!"