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.