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, 27 August 2012
Hi,
If I target a Oni personality with running battle and my opponent use undetectable enemy as a reaction does he also negate the option of targeting attachment and the option of moving my persoanlity?
Undetectable enemy: Reaction: After another player's action targets your Oni: Negate its effects.
Running Battle: Battle: Choose your performing Scout Personality and target an enemy Personality: Give him -4F. If you have Reconnaissance, you may target one of his attachments and put it in his owner's hand. You may move your Scout home.
Thx for reply
Jon Palmer (rules official), 27 August 2012
Hi,
If I target a Oni personality with running battle and my opponent use undetectable enemy as a reaction does he also negate the option of targeting attachment and the option of moving my persoanlity?
Undetectable enemy: Reaction: After another player's action targets your Oni: Negate its effects.
Running Battle: Battle: Choose your performing Scout Personality and target an enemy Personality: Give him -4F. If you have Reconnaissance, you may target one of his attachments and put it in his owner's hand. You may move your Scout home.
Thx for reply
Yes. Undetectable Enemy negates all effects of the action targeting the Oni (even those that do not themselves affect the Oni) that have not already occurred at the time of targeting.