MTG Rules Expert — Urza
Urza is MTGAI's AI rules assistant. Magic has over 20 years of layered rules — the stack, state-based actions, replacement effects, priority windows. Urza walks you through scenarios so you understand why a play works or doesn't, not just the final answer.
What Urza can answer
Combat tricks and blocking assignments, triggered abilities and the stack, layers and continuous effects, legend rule and clone interactions, Commander-specific rules (command tax, commander damage), and tournament shortcuts.
Describe the board state and the play in question. Urza references the Comprehensive Rules structure without dumping raw rule text — you get a clear explanation you can apply at the table.
When to use it
During deckbuilding when you are unsure whether two cards interact correctly. After a confusing game to settle a dispute with friends. While learning a new format whose rules differ from what you know. Before a tournament to clarify an edge case you keep forgetting.
How to ask Urza
- Open the Rules Expert and describe the game state: life totals, permanents in play, cards in hand if relevant.
- State the action or question: "Can I respond to this trigger?" or "What happens when both players have Hexproof?"
- Read the step-by-step ruling. Ask follow-up questions if a step is unclear.
- Use the ruling at your next game — Urza remembers context within the session.
FAQ
- Is Urza an official judge?
- No. Urza is an AI assistant trained on the Comprehensive Rules. For tournament play, the head judge's ruling is final. Urza is best for learning and casual play.
- Does it cover all formats?
- Yes — rules questions apply across formats. Format-specific bans and Commander rules are handled when you mention the format.