Arcum Dagsson [Double Masters] Merfolk Wizard it enters with an additional

it enters with an additional loyalty counter on it if it's a planeswalker

Sin is debt

Set: Planechase Anthology Planes Type: Plane — Bolas's Meditation Realm Rarity: Common At the beginning of your end step

{B}: Transform Bloodline Keeper

Set: Commander 2011 Type: Sorcery Rarity: Rare Cost: {W} Join forces — Starting with you

Arcum Dagsson [Double Masters] Merfolk Wizard it enters with an additionalSet: Double Masters Type: Legendary Creature Human Artificer Rarity: Mythic Cost: {3}{U} {T}: Target artifact creature's controller sacrifices it. That player may search their library for a noncreature artifact card, put it onto the battlefield, then shuffle. "Artifice sundered the world. It shall not again wreak such sorrow."