Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] N your opponent can't use any

your opponent can't use any Poke-Powers on his or her Pokemon

If there is any Stadium card in play

Set: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {6} {8}

you gain 2 life

its controller adds an additional one mana of that color

Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] N your opponent can't use anySet: 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.