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.
Ninja Battle: Once per battle, even if this card is bowed and even if you control no units at the current battlefield, target one or more unopposed units with combined total Force of 9 or lower, or one opposed unit: Move each target home; this will not be negated or delayed if you control a Ninja.
If I have 3 Unopposed Units of 4force at the battlefield, can my opponent use this Stronghold to send home two of them, or does the SH become useless if you have more than 9F unopposed? Thanks.
Ninja Battle: Once per battle, even if this card is bowed and even if you control no units at the current battlefield, target one or more unopposed units with combined total Force of 9 or lower, or one opposed unit: Move each target home; this will not be negated or delayed if you control a Ninja.
If I have 3 Unopposed Units of 4force at the battlefield, can my opponent use this Stronghold to send home two of them, or does the SH become useless if you have more than 9F unopposed? Thanks.
The Shadow's Lair does not say you must target all the unopposed units at the battlefield, so you may choose as many unopposed units as you wish within the targeting restriction of combined total Force of 9 or lower.