Karn, Legacy Reforged (MAT) #49 [EN/N] s/o

{5} · Legendary Artifact Creature — Golem · */* · Karn'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. · Illustrated by Grzegorz Rutkowski · March of the Machine: The Aftermath #49 · EDHREC rank 2514 · Magic: The Gathering, MTG