Karn, Scion of Urza (Promo Pack) [Dominaria Promos] Tamiyo Whenever you cast a spell

Whenever you cast a spell with an even mana value

put a +1/+1 counter on this creature

Set: March of the Machine Prerelease Promos Type: Creature — Faerie Rogue Rarity: Rare Cost: {1}{U} Flash

Set: Commander Legends: Battle for Baldur's Gate Prerelease Promos Type: Creature — Angel Knight Rarity: Mythic Cost: {2}{W}{W} Flying

you may put its +1/+1 counters on target artifact creature

Karn, Scion of Urza (Promo Pack) [Dominaria Promos] Tamiyo Whenever you cast a spellSet: Dominaria Promos Type: Legendary Planeswalker Karn Rarity: Mythic Cost: {4} +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."