Imskir Iron-Eater

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.