Sharuum, Viceroy of Esper

Flying, Vigilance, Deathtouch
Whenever one or more artifacts enter the battlefield under your control, you may have
each opponent lose 1 life. You gain life equal to
the life lost this way.
Tap target Sphinx you control: Create a colorless artifact named Etherium Cell with "{t}, Sacrifice
this artifact: Add one mana of any color to your
mana pool."