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, 23 January 2015
Hello! I had a quick question about this interaction.
If I'm at a battlefield and with Sulphurous Swamps in effect, play Stand or Run, and my opponent elects to move home bowed, who has to discard the card?
We weren't sure because while Stand or Run technically generates the action of a duel, it's the opponent's action (choice) to move home.
Cheers!
Stand Or Run: Iaijutsu Battle: Your target unbowed Personality challenges a target enemy Personality. If he is unbowed, he may refuse. If he does, move him home and bow him as he moves. Destroy the duel's loser.
Sulphurous Swamps: Players discard a card after each time one of their own actions moves a Personality home. After a player's action destroys this Terrain, he discards a card.
Alex Jones (rules official), 28 January 2015
Hello! I had a quick question about this interaction.
If I'm at a battlefield and with Sulphurous Swamps in effect, play Stand or Run, and my opponent elects to move home bowed, who has to discard the card?
We weren't sure because while Stand or Run technically generates the action of a duel, it's the opponent's action (choice) to move home.
Cheers!
Stand Or Run: Iaijutsu Battle: Your target unbowed Personality challenges a target enemy Personality. If he is unbowed, he may refuse. If he does, move him home and bow him as he moves. Destroy the duel's loser.
Sulphurous Swamps: Players discard a card after each time one of their own actions moves a Personality home. After a player's action destroys this Terrain, he discards a card.
Stand or Run moves the Personality home, so the player who played it discards a card.