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, 9 September 2012
If i play shinobi assault, could i asset denial to another province and destroy it from resolution?
Shinobi assault Limited: Choose your performing unbowed Ninja Personality and target another player's Personality: Create a battlefield (not at any province). Assign your Personality to attack there. Assign the target to defend there, even if he is bowed. Fight a battle there, in which you have the first opportunity to take a Battle action or pass. Lose 5 Honor.
Asset denial Open: Bow your performing Ninja Personality and target a Retainer: Destroy it. Battle: Choose your performing Ninja Personality with no non-Ninja Followers at the current battlefield: Move him to a different location. If he moved, straighten his unit. Discard a card in a province.
Brook Cunningham (rules official), 9 September 2012
If i play shinobi assault, could i asset denial to another province and destroy it from resolution?
Shinobi assault Limited: Choose your performing unbowed Ninja Personality and target another player's Personality: Create a battlefield (not at any province). Assign your Personality to attack there. Assign the target to defend there, even if he is bowed. Fight a battle there, in which you have the first opportunity to take a Battle action or pass. Lose 5 Honor.
Asset denial Open: Bow your performing Ninja Personality and target a Retainer: Destroy it. Battle: Choose your performing Ninja Personality with no non-Ninja Followers at the current battlefield: Move him to a different location. If he moved, straighten his unit. Discard a card in a province.
Asked and answered here: http://alderac.com/forum/viewtopic.php?f=59&t=96541&p=1275318&hilit=+Asset+Ambush#p1275318
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