§ 383.1.a Core Rules PDF (officieel)

§ 383 Triggered Abilities are repeatable effects that happen when a Condition is met.

§ 383.1 Triggered Abilities can usually be recognized by the word "when" followed by a game action or event; the word "at" followed by a point in time during the turn sequence; or the phrase “the [Nth] time” followed by a game action or event. Examples: "When you conquer here, you may spend a buff to draw 1…