A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
A player, 6 August 2007
RE: This. Specifically, Zen's request for contradiction from the Comprehensive Rules.
To Zen:
I believe the section you are overlooking is this, from Card Features; Traits, "Restrictions in the general form “once (or twice, etc.) per turn (or phase, game, etc.)” have a different meaning in a triggered trait if they come before or after the colon. Such a restriction in the constraints block, before the colon, means that the trait is only triggered once, at the first opportunity in that span of time to be triggered. Such a restriction in the effects block, after the colon, means that the trait is triggered every time the triggering condition is met, but the effect can only be applied once. This matters if the effect is optional; in that case the “once per turn” restriction is only used up if the effect is actually used."
So, Razor of the Dawn Castle can delay actually only one Personality's destruction per turn. Correct?
Martin Lund (rules official), 6 August 2007
RE: This. Specifically, Zen's request for contradiction from the Comprehensive Rules.
To Zen:
I believe the section you are overlooking is this, from Card Features; Traits, "Restrictions in the general form “once (or twice, etc.) per turn (or phase, game, etc.)” have a different meaning in a triggered trait if they come before or after the colon. Such a restriction in the constraints block, before the colon, means that the trait is only triggered once, at the first opportunity in that span of time to be triggered. Such a restriction in the effects block, after the colon, means that the trait is triggered every time the triggering condition is met, but the effect can only be applied once. This matters if the effect is optional; in that case the “once per turn” restriction is only used up if the effect is actually used."
So, Razor of the Dawn Castle can delay actually only one Personality's destruction per turn. Correct?
Exactly. I was just looking up that section myself.
Basically, the Trait triggers every time - but the effect is optional because it uses "may."
The effect can only happen once per turn, but does not automatically use itself up at the first opportunity like a "Once per turn [Random Trait Trigger Condition]: [Generated Effect]," template Trait would.
The [TRIGGER]: Once per turn, you may [EFFECT] template give the player the ability to wait for the opportune moment to invoke the effect.
Zen Faulkes (rules official), 6 August 2007
Works for me. Fixing.