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.
Would Asako Keiki be able to use his reaction after using Yobanjin Fortress to create a 1/1 personality in the battle?
Asako Keiki Reaction: After you bring a personality into play: Gain 1 honor
Yobanjin Fortress: Battle: Bow this card: Create a 1/1 Yobanjin Personality in your army at the current battlefield. Remove him from the game after two more actions resolve or after the battle ends.
-Matt
Would Asako Keiki be able to use his reaction after using Yobanjin Fortress to create a 1/1 personality in the battle?
Asako Keiki Reaction: After you bring a personality into play: Gain 1 honor
Yobanjin Fortress: Battle: Bow this card: Create a 1/1 Yobanjin Personality in your army at the current battlefield. Remove him from the game after two more actions resolve or after the battle ends.
-Matt
Created cards enter play right after they are created.
Heck, if they can not legally enter play they cease to exist immediately.