Urza's Factory is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.
Official card text
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Complete guide
Urza's Factory is a versatile utility land that provides both mana and a long-term win condition for colorless or control-heavy decks. While its subtype Urza's carries no inherent rules on its own, its ability to manufacture Assembly-Workers allows you to build an army without using a single spell slot.
Manufacturing Mana and Minions
Urza's Factory serves two primary purposes: providing colorless mana immediately or creating 2/2 Assembly-Worker artifact creature tokens later in the game. As a land, it doesn't use the stack when played, but its token-creating ability is an activated ability that can be responded to by your opponents.
Step-by-Step Resolution
To create a token, you must pay seven generic mana and tap the Factory. Once the ability is activated, it goes on the stack; if it resolves, you place a 2/2 colorless Assembly-Worker artifact creature token onto the battlefield. Because this is an activated ability of a land, it can be done at the end of an opponent's turn to keep your mana open for other plays.
Understanding Subtypes
One common mistake is assuming the Urza's subtype grants special powers similar to Urza's Tower or Mine. Per official rulings, the Urza's subtype has no inherent rules meaning and does not contribute to the 'Urza's' land set unless specifically mentioned by another card's text.
Strategic Timing
Since creating a token costs a total of eight mana (seven generic plus tapping the Factory itself), this is best utilized in the late game. It is a perfect 'mana sink' for when you have exhausted your hand but need to maintain board presence or create blockers.
Interaction examples
On your turn, you play Urza's Factory. You can immediately tap it to add one colorless mana to your mana pool to help cast a spell.
Assembly-WorkerDuring your opponent's end step, you have eight mana available. You pay seven mana and tap Urza's Factory to activate its ability. A 2/2 colorless Assembly-Worker artifact creature token is created, and it will be ready to attack on your next turn since its summoning sickness will have passed.
Command Tower
Exotic OrchardIf you control all three lands, Command Tower and Exotic Orchard provide colored mana based on your commander or opponents. Urza's Factory provides stable colorless mana but offers the unique utility of turning that mana into creatures, something the other two lands cannot do.
Guide written with AI from the official text and rulings. Official English text prevails.
How it works : Urza's Factory
Original English text — Wizards of the Coast / Scryfall
- #1· Wizards of the Coast
Urza's is a land subtype that has no inherent rules meaning. Other effects may refer to it.
No other card is named in this ruling.
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Meta decks with Urza's Factory
No archived Top 8 deck with this card yet.