Whatever the opinion of some fighters, a challenge is over when one party is killed by the other to ghost.
The animists may declare whichever guild rules and restrictions on their members they like, but when an ally of mine is defeated in a challenge, I have no hesitation about preventing them riding the ship.
I also have no ill feelings to others who do the same.
Please then, let's not pretend anyone has the 'right' to cause additional suffering to someone who has accepted a challenge and lost.
Certainly, the idea that I have heard bandied around in the past, that a seer should have a right to take an individual's head in peace after succesfully killing someone in challenge, is ridiculous.
Fight on, if you must, but don't expect special favours from anyone but the animist and their funny rules.
Written by my hand on the 16th of Mournsend, in the year 1044.