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, 20 March 2013
Relevant text:
Yajinden Maho Reaction: Even if Yajinden is bowed, before a Maho effect gives one of your Personalities a Chi penalty: Another Personality of your choice receives it instead.
Iuchi Shahai Maho Battle: Three times per turn: Give Shahai a -1F/-1C Maho token. If she is still in play, you may target another Personality and give him a -1F/-1C Maho token.
If Yajinden is in play, and Shahai cuts herself ... what happens? Basically, the short form of this question is: does the redirection sever the chi penalty from the other aspects of Maho token (and, if so, is that temporary?), or does Yajinden actually stick Shahai's entire self-inflicted Maho on some innocent victim?
Brook Cunningham (rules official), 21 March 2013
Relevant text:
Yajinden Maho Reaction: Even if Yajinden is bowed, before a Maho effect gives one of your Personalities a Chi penalty: Another Personality of your choice receives it instead.
Iuchi Shahai Maho Battle: Three times per turn: Give Shahai a -1F/-1C Maho token. If she is still in play, you may target another Personality and give him a -1F/-1C Maho token.
If Yajinden is in play, and Shahai cuts herself ... what happens? Basically, the short form of this question is: does the redirection sever the chi penalty from the other aspects of Maho token (and, if so, is that temporary?), or does Yajinden actually stick Shahai's entire self-inflicted Maho on some innocent victim?
The "it" in "receives it instead" only refers to the Maho Chi penalty that your Personality was going to receive, per Yajinden's trigger. The other, optionally targeted one, can go wherever you like.
A player, 22 March 2013
Regarding this ruling: viewtopic.php?f=59&t=102475
Giving Iuchi Shahai a -1F/-1C token is not an effect, but a cost. As such, Yajinden's reaction should not affect that. It could affect the chi penalty given as the optional targeting effect.
Ben Higgins (rules official), 22 March 2013
Regarding this ruling: viewtopic.php?f=59&t=102475
Giving Iuchi Shahai a -1F/-1C token is not an effect, but a cost. As such, Yajinden's reaction should not affect that. It could affect the chi penalty given as the optional targeting effect.
The token placed on Shahai is not in fact a cost, as it does not appear in the constraints block.
Based upon the Oracle text, the previous ruling is correct.