Contagion Engine [Scars of Mirrodin] Battle Academy 2020 If he can't leave Ixalan

If he can't leave Ixalan

Set: EX: Unseen Forces Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

For all its traps and defenses

Set: Sun & Moon: Black Star Promos Type: Metal Rarity: Promo Retreat cost: Colorless

and the Unbeholden

Contagion Engine [Scars of Mirrodin] Battle Academy 2020 If he can't leave IxalanSet: Scars of Mirrodin Type: Artifact Rarity: Rare Cost: {6} When Contagion Engine enters the battlefield, put a 1 1 counter on each creature target player controls. {4}, {T}: Proliferate, then proliferate again. (Choose any number of permanents and or players, then give each another counter of each kind already there. Then do it again.)