Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] Human Gamer and the harmony of voices

and the harmony of voices uplifted in unison

The Reunion — {3}

−7: You may cast up to three spells from among face-up cards your opponents own from exile without paying their mana costs

plus a card style for each:

Set: Ravnica Remastered Type: Legendary Creature — Dragon Wizard Rarity: Rare Cost: {U}{U}{U}{R}{R}{R} This spell can't be countered

Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] Human Gamer and the harmony of voicesSet: March of the Machine: The Aftermath Type: Legendary Artifact Creature Golem Rarity: Mythic Cost: {5} Karn, Legacy Reforged'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 mana can't be spent to cast nonartifact spells. Until end of turn, you don't lose this mana as steps and phases end.