Urza's Saga
Enchantment Land — Urza's Saga
I
— This Saga gains "
: Add 
."
II — This Saga gains "
: Create a 0/0 colorless Construct artifact creature token with 'This token gets +1/+1 for each artifact you control.'"
III — Search your library for an artifact card with mana cost 
or 
, put it onto the battlefield, then shuffle.
Titus Lunter
Mystery Booster 2 (MB2)
• #114Rulings
Urza's Saga is a land, so it can only be played as a land. It cannot be cast as a spell.
(wotc • 2021-06-18)
Although Urza's Saga has the Urza's land type, it doesn't interact with Urza's Tower, Urza's Mine, or Urza's Power Plant.
(wotc • 2021-06-18)
Even though Urza's Saga is a land, it is also still a Saga, and it will be sacrificed after its last chapter ability resolves.
(wotc • 2021-06-18)
While resolving the chapter III ability, you can find only a card with actual mana cost {0} or {1}, not mana value 0 or 1. For example, you couldn't find a card with mana cost {U} or one with mana cost {X}.
(wotc • 2021-06-18)
If Urza's Saga loses all of its chapter abilities but is still a Saga, perhaps due to a card like Blood Moon, it will immediately be sacrificed.
(wotc • 2021-06-18)
Urza's Saga gains an ability from its first and second chapters. It keeps those abilities for as long as it's on the battlefield.
(wotc • 2021-06-18)
Rulings
Urza's Saga is a land, so it can only be played as a land. It cannot be cast as a spell.
(wotc • 2021-06-18)
Although Urza's Saga has the Urza's land type, it doesn't interact with Urza's Tower, Urza's Mine, or Urza's Power Plant.
(wotc • 2021-06-18)
Even though Urza's Saga is a land, it is also still a Saga, and it will be sacrificed after its last chapter ability resolves.
(wotc • 2021-06-18)
While resolving the chapter III ability, you can find only a card with actual mana cost {0} or {1}, not mana value 0 or 1. For example, you couldn't find a card with mana cost {U} or one with mana cost {X}.
(wotc • 2021-06-18)
If Urza's Saga loses all of its chapter abilities but is still a Saga, perhaps due to a card like Blood Moon, it will immediately be sacrificed.
(wotc • 2021-06-18)
Urza's Saga gains an ability from its first and second chapters. It keeps those abilities for as long as it's on the battlefield.
(wotc • 2021-06-18)