Karn, Legacy Reforged [March of the Machine: The Aftermath] Phyrexian Praetor where X is that spell's

where X is that spell's converted mana cost

Put that many +1/+1 counters on Nantuko Cultivator and draw that many cards

transform him

Set: Outlaws of Thunder Junction Commander Type: Instant Rarity: Rare Cost: {U}{R} When you cast your next instant or sorcery spell this turn

T: Mill five cards

Karn, Legacy Reforged [March of the Machine: The Aftermath] Phyrexian Praetor where X is that spell'sSet: 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.