Imskir Iron-Eater (Borderless) [Modern Horizons 3]

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.
3R, Sacrifice an artifact: Imskir deals damage equal to the sacrificed artifact's mana value to any target.