Urza's Saga

(As this Saga enters and after your draw step,
add a lore counter. Sacrifice after III.)

I: Ursa's Saga gains "{t}{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 onto the battlefield, then shuffle.