Karn, Scion of Urza (Prerelease) (Dominaria) - (Foil): Dominaria Promos 15 put a +1/+1 counter on

put a +1/+1 counter on it

{2}{U}{B}: Exile target creature card from a graveyard

and/or library for a card with the same name as that spell and put it onto the battlefield

Other Faeries you control have shroud

Karn, Scion of Urza (Prerelease) (Dominaria) - (Foil): Dominaria Promos 15 put a +1/+1 counter on[+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. [1]: Put a card you own with a silver counter on it from exile into your hand. [2]: Create a 0 0 colorless Construct artifact creature token with "This creature gets +1 +1 for each artifact you control."