Cascade & exile synergy: Cast multiple spells for free and keep the pressure on
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In Commander, I think Oko might win in a landslide, since the high loyalty decreases the vulnerability to being attacked by multiple opponents, and the trade ability is more likely to find a high-value target
Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.) Watermark: Dimir Illustrated by James Ryman Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Not Legal Modern Legal Brawl Not Legal Legacy Legal Comp
Fake cards often have incorrect foil treatment or wrong rarity codes
First, like Vexing Shusher or other cards, Spellbreaker Behemoth can't be countered