Reinforcement Manufacturing

As Reinforcement Manufacturing enters the battlefield, choose Mirran or Phyrexian.
•Mirran—Whenever you cast an artifact spell,
create a 1/1 colorless Myr artifact creature token.
•Phyrexian—At the beginning of your end step,
draw a card, then discard a card. Then if there are fifteen or more artifact cards in your graveyard,
target opponent loses the game.