Retrofitter Foundry [Commander 2018] Karn is the chaos of a

is the chaos of a thundercloud

and it has "{2}{U}{U}: Return this creature to its owner's hand at the beginning of the next end step

Set: Planechase Planes Type: Plane — Valla Rarity: Common Whenever a creature enters the battlefield

each gets +2/+2

sacrifice it

Retrofitter Foundry [Commander 2018] Karn is the chaos of aSet: Commander 2018 Type: Artifact Rarity: Rare Cost: {1} {3}: Untap Retrofitter Foundry. {2}, {T}: Create a 1 1 colorless Servo artifact creature token. {1}, {T}, Sacrifice a Servo: Create a 1 1 colorless Thopter artifact creature token with flying. {T}, Sacrifice a Thopter: Create a 4 4 colorless Construct artifact creature token.