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, 15 March 2012
Broken Alliance: "Battle/Open: Target an attachment and pay Gold equal to its Gold Cost minus two: Destroy it." Blade of Champions: "Reaction: When a Battle action would target a card in this unit, bow this card: The action targets another of your cards instead, if legal."
The rules question is obvious. If I use Broken Alliance during the Open phase to destroy Blade of Champions, is it considered a Battle action (due to "Battle" being printed on its ability), and thus can Blade of Champions redirect it?
Brook Cunningham (rules official), 15 March 2012
Broken Alliance: "Battle/Open: Target an attachment and pay Gold equal to its Gold Cost minus two: Destroy it." Blade of Champions: "Reaction: When a Battle action would target a card in this unit, bow this card: The action targets another of your cards instead, if legal."
The rules question is obvious. If I use Broken Alliance during the Open phase to destroy Blade of Champions, is it considered a Battle action (due to "Battle" being printed on its ability), and thus can Blade of Champions redirect it?
Fortunately, the answer is also obvious:
Abilities and actions, Designators: "Abilities with two designators, such as “Open/Battle,” count as having both individual designators, but the action they generate has only one designator, according to when the action was taken."
A Battle/Open action taken during the Action Phase would not provide a valid trigger for Blade of Champions.