Rule · Chapter 6
cr:6.6.1
A triggered effect is an effect that can be triggered to put a triggered-layer on the stack. Triggered effects are typically written in the format “[LIMIT?] (When / Whenever / At / The [ORDINAL] time / The next time) [EVENT and/or STATE] [ABILITIES].” Triggered effects never use the term “instead”.[6.4]
Note: Cards printed before 2022 have also used the format “If [EVENT and/or STATE] [ABILITIES]” and “[LIMIT?] effect - (When / Whenever) [EVENT and/or STATE] [ABILITIES].”