Inneum Zir, Steelmind

Indestructible, Haste.
Sacrifice an artifact, {t}: Inneum Zir, Steelmind
deals 5 damage to any target.
Sharpened — At the beginning of your upkeep, sacrifice a creature with toughness greater than 3.
If you can't, creatures you control get +2/+0 and haste, and you may draw a card.
"Learn. Die. Repeat."