Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] Eldraine put that many +1/+1 counters

put that many +1/+1 counters on target Halfling or Treefolk

materialize your artifacts

including a combination of 1 card of rarity Rare or higher and 3 Uncommon

Set: March of the Machine Type: Legendary Creature — Phyrexian Praetor Rarity: Mythic Cost: {3}{B}{B} Menace

each opponent sacrifices a creature that dealt combat damage to you this turn

Karn, Legacy Reforged (Retro) [March of the Machine: The Aftermath] Eldraine put that many +1/+1 countersSet: 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.