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.
If Hida Kisada has been hit with a range attack at a battlefield with Koshin Keep's ability is active and it didn't kill him the Mantis player gets to take another shot. Can the Crab player use Hida Kisada reaction to target someone else?
I'm not sure what the correct answer is because normally it should work but Koshin Keep restricts the Mantis player target and I don't know if that same restriction applys to the Crab player.
If Hida Kisada has been hit with a range attack at a battlefield with Koshin Keep's ability is active and it didn't kill him the Mantis player gets to take another shot. Can the Crab player use Hida Kisada reaction to target someone else?
I'm not sure what the correct answer is because normally it should work but Koshin Keep restricts the Mantis player target and I don't know if that same restriction applys to the Crab player.
Targets must remain legal when you use a retargeting effect; due to the text on Koshin Keep Kisada is the only legal target for subsequent ranged attacks in your scenario.