Imskir Iron-Eater [Modern Horizons 3]

Set: Modern Horizons 3 Type: Legendary Creature — Demon Rarity: Rare Cost: {6}{B}{R} Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)When Imskir Iron-Eater enters the battlefield, you draw X cards and you lose X life, where X is half the number of artifacts you control, rounded down.{3}{R}, Sacrifice an artifact: Imskir deals damage equal to the sacrificed artifact's mana value to any target.