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, 18 January 2010
Regarding this ruling: http://www.alderac.com/forum/viewtopic.php?f=59&t=79042#p1047285, is the "...after Hisoka enters play" part of the constraints block(on his first ability) a condition that will be overridden, just like the "Once per game" part? If I target my Hisoka(who has already used his first ability when he entered play) with Whispers of a dying sun, can I pay the 4 gold to destroy a province?
Whispers of the Dying Sun Choose a (non-Stronghold) card in play. Each of its base abilities may be used one additional time this turn.
Bayushi Hisoka Scorpion Clan • Courtier • Imperial • Experienced • Loyal • Unique • Imperial Chancellor Political Reaction: Once per game, after Hisoka enters play, pay 4 Gold: Destroy a province belonging to a target player with 2 or more provinces. Until the game ends, once in each of his turns, he may refill one of his provinces face-up. Political Limited: A target player with 4 or more provinces loses 2 Honor.
Dan Jacobson (rules official), 18 January 2010
Regarding this ruling: http://www.alderac.com/forum/viewtopic.php?f=59&t=79042#p1047285, is the "...after Hisoka enters play" part of the constraints block(on his first ability) a condition that will be overridden, just like the "Once per game" part? If I target my Hisoka(who has already used his first ability when he entered play) with Whispers of a dying sun, can I pay the 4 gold to destroy a province?
Whispers of the Dying Sun Choose a (non-Stronghold) card in play. Each of its base abilities may be used one additional time this turn.
Bayushi Hisoka Scorpion Clan • Courtier • Imperial • Experienced • Loyal • Unique • Imperial Chancellor Political Reaction: Once per game, after Hisoka enters play, pay 4 Gold: Destroy a province belonging to a target player with 2 or more provinces. Until the game ends, once in each of his turns, he may refill one of his provinces face-up. Political Limited: A target player with 4 or more provinces loses 2 Honor.
If you can kill him and bring him back into play, yes, Whispers of the Dying Sun will allow Bayushi Hisoka xp to use his Reaction again in a game. (Extension of Border Keep ruling mentioned)