Originally posted by Jochem van 't Hull:

James Winward-Stuart
This might not go down well with Nala, so it might be worth chatting to her later about how you can't “gotcha” people into missing triggers, how it's always a good idea to ask how things stand in the game if there is any ambiguity… and how long, if you are hoping for your opponent to miss their triggers, you need to wait.

I've been wondering… How long is that?

No amount of time makes triggers missed, only advancing the game past the point where they would have mattered. See IPG 2.1:

The point by which the player needs to demonstrate this awareness depends on the impact that the trigger would have on the game:
• A triggered ability that requires its controller to choose targets (other than ‘target opponent’), modes, or other choices made when the ability is put onto the stack: The controller must announce those choices before they next pass priority.
• 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 taken or choice made is before taking any game actions (such as casting a sorcery spell or explicitly moving to the next step or phase) that can be taken only after the triggered ability should have resolved. Note that casting an instant spell or activating an ability doesn’t mean a triggered ability has been forgotten, as it could still be on the stack.
• A triggered ability that changes the rules of the game: The controller must prevent an opponent from taking any resulting illegal action.
• A triggered ability that affects the game state in non-visible ways: The controller must take physical action or make it clear what the action is the first time the change has an effect on the visible game state.

Edited James Winward-Stuart (June 16, 2014 06:57:49 AM)