Karn, Legacy Reforged headlines many colorless artifact decks as a commander that turns your mana rocks into both ramp and card draw. Deck techs emphasize how he scales with the total mana value of your artifacts, enabling big haymakers and combo pieces. He slots naturally into Golem-tribal and 'big artifact' shells that were already popular among colorless enthusiasts. Players who enjoy the challenge of colorless deckbuilding and explosive, artifact-driven late games have eagerly adopted Karn as a centerpiece.