Do players need to point out their opponents' triggers at Competitive or Professional REL?

At Competitive or Professional REL, players are not required to point out their opponents' triggered abilities. The responsibility for managing triggered abilities lies primarily with the player who controls those triggers. This design aligns with the competitive nature of these formats, where players are expected to be knowledgeable and vigilant about their own play and the state of the game.

This rule encourages a higher level of awareness and accountability among players, promoting strategic thinking and engagement in the game. While it is encouraged for players to be courteous and informative about game state and potential triggers, failing to point out an opponent's triggers does not typically incur penalties, provided the trigger is not missed permanently.

In contrast, the other options imply varying levels of obligation to notify about triggers, which are not reflective of the rules at Competitive or Professional REL. The competitive environment is predicated on players being aware of and managing their own triggers, reinforcing a skill set that is vital as players progress in their understanding of the game.