Karn, Legacy Reforged [March of the Machine: The Aftermath] Rat Ninja Whenever you cast a Kraken

Whenever you cast a Kraken

" —Nissa Revane

•1 Deep Trouble playmat​

double the number of +1/+1 counters on each creature you control

−3: Return up to one target artifact

Karn, Legacy Reforged [March of the Machine: The Aftermath] Rat Ninja Whenever you cast a KrakenSet: 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.