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, 31 January 2015
during a battle and my opponent use reserve to bring in a personality the battle with sulphurous swamp in play. does he need to discard?
the step for reserve is from out of play move in home? and then move in battle?
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.
Jon Palmer (rules official), 31 January 2015
during a battle and my opponent use reserve to bring in a personality the battle with sulphurous swamp in play. does he need to discard?
the step for reserve is from out of play move in home? and then move in battle?
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.
No, Reserve simply brings the Personality into play at the battlefield. No movement is involved, so no discard is required.