Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] Modern Horizons 2 Set: Modern Horizons 3 Type:

Set: Modern Horizons 3 Type: Creature — Snake Druid Rarity: Rare Cost: {1}{G} {T}: Add {G}

you may move all counters from The Ozolith onto target creature

Set: Outlaws of Thunder Junction Prerelease Promos Type: Creature — Dragon Rarity: Mythic Cost: {3}{R}{R} Flying

If you're new to trading card games

where X is its mana value

Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] Modern Horizons 2 Set: Modern Horizons 3 Type:Set: 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.