Karn, Legacy Reforged (Foil Etched) [March of the Machine: The Aftermath] Colorless[+10] Whenever Battle Myrsphere attacks

Whenever Battle Myrsphere attacks

Set: Secret Lair: From Cute to Brute Type: Basic Land — Forest Rarity: Common ({T}: Add {G})

Set: The Lord of the Rings: Tales of Middle-Earth Commander Type: Creature — Halfling Citizen Rarity: Uncommon Cost: {1}{G} When Prosperous Innkeeper enters the battlefield

Treebeard others make it

Set: Sun & Moon: Cosmic Eclipse Type: Colorless Rarity: Uncommon Retreat cost: Colorless

Karn, Legacy Reforged (Foil Etched) [March of the Machine: The Aftermath] Colorless[+10] Whenever Battle Myrsphere attacksSet: 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.