A delayed triggered ability will trigger only once—the next time its trigger event occurs—unless it has a stated duration, such as “this turn.” If its trigger event occurs more than once simultaneously and the ability doesn’t have a stated duration, the controller of the delayed triggered ability chooses which event causes the ability to trigger.
January 25, 2019 · Ravnica Allegiance
A delayed triggered ability will trigger only once-the next time its trigger event occurs-unless it has a stated duration, such as "this turn."
May 1, 2014 · Journey into Nyx
A delayed triggered ability will trigger only once—the next time its trigger event occurs—unless it has a stated duration, such as “this turn.”
September 30, 2011 · Innistrad
A delayed triggered ability will trigger only once -- the next time its trigger event occurs -- unless it has a stated duration, such as "this turn."
June 17, 2011 · Commander 2011
A delayed triggered ability will trigger only once—the next time its trigger event occurs—
April 1, 2011 · Duel Decks: Knights vs. Dragons
A delayed triggered ability will trigger only once -- the next time its trigger event occurs -- unless it has a stated duration, such as "this turn."
February 4, 2011 · Mirrodin Besieged
A delayed triggered ability will trigger only once—the next time its trigger event occurs—unless it has a stated duration, such as “this turn.”
October 1, 2010 · Scars of Mirrodin
A delayed triggered ability will trigger only once—the next time its trigger event occurs—
February 1, 2010 · Worldwake
A delayed triggered ability will trigger only once -- the next time its trigger event occurs -- unless it has a stated duration, such as "this turn."