What kind of action can cause a missed trigger?

A missed trigger occurs when a player fails to place a game effect resulting from a triggered ability on the stack. This can happen during quick plays, where players may not fully acknowledge or have the opportunity to respond to each trigger due to the swift pace of play or pressure to maintain the momentum of the game.

In contrast, predefined mandatory actions, normal game progression, and a slow game flow do not inherently cause missed triggers. Mandatory actions require players to execute them as rules dictate, while normal game progression includes typical gameplay scenarios that facilitate the execution of triggers. A slow game flow might even provide more chances for players to recognize and respond to triggers. Therefore, it is the context of a deliberate, quick play that can create an environment where a player inadvertently overlooks a trigger.