Urza's Saga

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I - Urza's Saga gains "{t}: Add {c}."

II - Urza's Saga gains "{2}, {t}: Create a 0/0 colorless Construct artifact creature token with 'This creature gets +1/+1 for each artifact you control.'"

III - Search your library for an artifact card with mana cost {0} or {1}, put it on the battlefield, then shuffle.