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, 14 April 2014
If my opponent duels Ninube Shiho and takes control of him with Kokujin inexperienced and after my next action uses Ninube Shiho's ability Ninja Battle: Put Shiho on top of your Dynasty deck (face-down). Put all cards without attachments in a target enemy Personality's unit on the bottom of their appropriate deck.
Does Shiho go to the top of my opponents "The current controller of shiho" deck or the owners "my" deck and in the case of a kotei would shiho going in the opponents deck count as having a marked card in his deck, especially if he does something to shuffle his dynasty deck, like a Jade pearl Inn due to most likely different sleeves for the cards.
We had two spiders playing each other and were curious about how to resolve this unusual chain of events.
Kokujin's effect
Battle: Kokujin challenges a target enemy Personality. Destroy the duel's loser or, if Kokujin wins, you may destroy one of your Personalities (at any location) to take control of the loser (he joins Kokujin's army).
Thank You!
Brook Cunningham (rules official), 18 April 2014
If my opponent duels Ninube Shiho and takes control of him with Kokujin inexperienced and after my next action uses Ninube Shiho's ability Ninja Battle: Put Shiho on top of your Dynasty deck (face-down). Put all cards without attachments in a target enemy Personality's unit on the bottom of their appropriate deck.
Does Shiho go to the top of my opponents "The current controller of shiho" deck or the owners "my" deck and in the case of a kotei would shiho going in the opponents deck count as having a marked card in his deck, especially if he does something to shuffle his dynasty deck, like a Jade pearl Inn due to most likely different sleeves for the cards.
We had two spiders playing each other and were curious about how to resolve this unusual chain of events.
Kokujin's effect
Battle: Kokujin challenges a target enemy Personality. Destroy the duel's loser or, if Kokujin wins, you may destroy one of your Personalities (at any location) to take control of the loser (he joins Kokujin's army).
Thank You!
Cards can only ever enter their owners' decks or discard piles. If a card is about to go to one of those places that is not its owner's, it goes to its owner's instead.