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, 21 July 2014
I resolve Blessings of Isawa, and the next Kiho to resolve in the game is Riddle of Rebirth, performed by my Henshin.
What happens?
a) my Henshin becomes an unstoppable entity of mass destruction, and can bow once per turn to send any unit whose guy shares a keyword with him to the deckbottoms, with no other cost b) my Henshin temporarily becomes an unstoppable entity of mass destruction, but the next time he uses his new "ability" he gets RFG just as the original Riddle was c) my Henshin has now solved the Riddle, and I win by enlightenment d) this is an illegal play. Much like crossing the streams, "It would be bad".
Jon Palmer (rules official), 21 July 2014
I resolve Blessings of Isawa, and the next Kiho to resolve in the game is Riddle of Rebirth, performed by my Henshin.
What happens?
a) my Henshin becomes an unstoppable entity of mass destruction, and can bow once per turn to send any unit whose guy shares a keyword with him to the deckbottoms, with no other cost b) my Henshin temporarily becomes an unstoppable entity of mass destruction, but the next time he uses his new "ability" he gets RFG just as the original Riddle was c) my Henshin has now solved the Riddle, and I win by enlightenment d) this is an illegal play. Much like crossing the streams, "It would be bad".
b) - Riddle of Rebirth's "remove this card" will be transferred to the ability the Personality gains, and will remove the Personality from the game.