Do players need to announce opponent triggers before they become relevant, and can they respond to triggers that weren't announced? Specifically, if an opponent plays spells that would trigger a student (like Ravenbloom) but doesn't announce it, can you still respond with cards like Gust?

Ruling: Triggers always activate but don't need to be announced until they have an observable game impact (like physical changes or might changes during combat). However, opponents cannot rush through actions without giving you a chance to respond - this is angle shooting and warrants a judge call and potential rewind.

Sequence:

• Triggers occur automatically when their conditions are met
• They don't need to be verbally announced until they have observable game impact
• Players must still allow opponents reasonable opportunity to respond to spells/triggers
• If an opponent rushes through without allowing responses, call a judge for a rewind

Nuances:

• You can proactively tell your opponent to "hold on" before a spell resolves if you want to react to a trigger
• If you want certainty, respond to the spell that would cause the trigger rather than waiting for the trigger announcement
• Players are responsible for tracking opponent triggers that may become relevant to their own plays
• At the start of combat, might changes should be announced
• If an opponent acknowledges a trigger later (e.g., "student is 4 might") at the appropriate time, they haven't missed it - you may have just made a misplay by not tracking it