Karn Scion of Urza

“[+1]: Reveal the top two cards of your library. An opponent chooses one of them. Put that card into your hand and exile the other with a silver counter on it. <br>[-1]: Put a card you own with a silver counter on it from exile into your hand. <br>[-2]: Create a 0/0 colorless Construct artifact creature token with "This creature gets +1/+1 for each artifact you control.”