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, 10 September 2012
I know from other questions that any text after targeting an oni would be negated by Undetectable Enemy (i.e. Running Battle). My question is if targeting happens after other effects in an action, whether those prior effects would similarly be negated?
Relevant Text Kuon's Legacy Battle/Open: Choose your performing Personality with 7 or more base Force: His eyes go dead. Straighten him. Give him +3F. He may not perform actions. You may target and bow a card at his location.
Undetectable Enemy
Reaction: After another player's action targets your Oni: Negate its effects.
Brook Cunningham (rules official), 11 September 2012
I know from other questions that any text after targeting an oni would be negated by Undetectable Enemy (i.e. Running Battle). My question is if targeting happens after other effects in an action, whether those prior effects would similarly be negated?
Yes... ish.
Previously enacted ongoing effects would be indeed be negated (surpressed until the end of the turn), such as the +3F and "He may not perform actions".
However if, say, those effects had a longer duration than 'til the end of the turn themselves, then they would reassert after the negation wore off. And also, negation will not undo previously inacted instantaneous effects. So the straightening effect, having already occurred, would still stand.