Aang is playing against Naya in a Standard PPTQ. Aang controls an Eldrazi Mimic and casts a Walker of the Wastes. Aang asks if he can go to attacks, which Naya confirms. Aang declares the Mimic as an attacker, and Naya blocks with her Spawnbinder Mage. Aang says, “Ok, damage, yours dies,” to which Naya responds, “No, yours dies. Judge!”
What do you do?
Judges, feel free to discuss this scenario on Judge Apps!Answer
A triggered ability that causes a change in the visible game state (including life totals) or requires a choice upon resolution: The controller must take the appropriate physical action or make it clear what the action to be taken or choice made is before taking any game actions (such as casting a sorcery spell or explicitly taking an action in the next step or phase) that can be taken only after the triggered ability should have resolved.
In this case, by passing priority to move from the main phase to combat without mentioning the trigger or a P/T change, Aang has missed the trigger. As the trigger is not generally detrimental, there is no penalty. Briefly educate if necessary about why this trigger is unique, ask Naya if she would like the trigger placed on the stack, then have the players continue with their match.
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