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'[+1]: Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") [−1]: Pay any amount of mana. Look...
'Karn's power and toughness are each equal to the greatest mana value among artifacts you control. At the beginning of your upkeep, add {C} for each artifact you control. This...
'Activated abilities of artifacts your opponents control can't be activated. [+1]: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each...
'[+1]: Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") [−1]: Pay any amount of mana. Look...
'Karn's Sylex enters tapped. Players can't pay life to cast spells or to activate abilities that aren't mana abilities. {X}, {T}, Exile Karn's Sylex: Destroy each nonland permanent with mana...
'[+4]: Target player exiles a card from their hand. [−3]: Exile target permanent. [−14]: Restart the game, leaving in exile all non-Aura permanent cards exiled with Karn. Then put those...
As Kai Winn enters, choose a nonland card name. Whenever an opponent casts a spell with the chosen name or activates an ability of a source with the chosen name,...
As Kai Winn enters, choose a nonland card name. Whenever an opponent casts a spell with the chosen name or activates an ability of a source with the chosen name,...