Urza, Supreme Artificer

+2: Draw a card then discard a card. If that card was an artifact card, you may cast it from your graveyard until end of turn.
-2: Create a 0/0 colorless construct artifact creature token with "This creature gets +1/+1 for each artifact you control."
-10: You get an emblem with "Artifact creatures you control get +5/+5, menace, and trample. On your draw step, draw an extra card."