Urza's Saga

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 onto the battlefield, then shuffle.