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, 4 December 2014
viewtopic.php?f=59&t=111091 Relentless was ruled like this, which is ok I can follow this: You must be able to show that you will be able to target your opposed card (at the current battlefield) when you announce Relentless; if you cannot, you may not announce the action.
viewtopic.php?f=59&t=111044 However when I have a lone defender without follower at a battlefield, I should not be able to announce A Good Death, since I am not able to show that I will be able to target a personality to give it +2F and Resilient. Because the target is choosen AFTER my lone defender died, I will never be able to target anyone with this action since nobody it there after my defender died. So according to the Relentless ruling I should not be allowed to announce this action at all, if I only have a lone defender.
Jon Palmer (rules official), 5 January 2015
viewtopic.php?f=59&t=111091 Relentless was ruled like this, which is ok I can follow this: You must be able to show that you will be able to target your opposed card (at the current battlefield) when you announce Relentless; if you cannot, you may not announce the action.
viewtopic.php?f=59&t=111044 However when I have a lone defender without follower at a battlefield, I should not be able to announce A Good Death, since I am not able to show that I will be able to target a personality to give it +2F and Resilient. Because the target is choosen AFTER my lone defender died, I will never be able to target anyone with this action since nobody it there after my defender died. So according to the Relentless ruling I should not be allowed to announce this action at all, if I only have a lone defender.
The rules don't support a level of inference of "I know my Personality will be dead", which is why A Good Death may be played in this case, and Relentless may not.