Contagion Engine [The List] Anthologies instead each opponent sacrifices half

instead each opponent sacrifices half the creatures they control

the Southland king: / A dragon coiled

Set: Summer Magic / Edgar Type: Artifact Rare Cost: {1} Creatures with power 3 or greater don't untap during their controllers' untap steps

Set: Magic Player Rewards 2004 Type: Token Creature — Angel Common Cost: Flying

Set: Avacyn Restored Type: Legendary Creature — Demon Mythic Cost: {4}{B}{B}{B}{B} Flying

Contagion Engine [The List] Anthologies instead each opponent sacrifices halfSet: The List 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.)