The spirit guardians will pull them out and set them free. They will end up staying in Avalon (and hopefully not get mixed up in the Forest of the Felled, as the wards and curses are still up all over the forest-- this will be addressed in the future, so even if one or two get caught again, it won't be for long). The spirit guardians do not have a long lifespan, so they will disappear a few days after they are born or if it is destroyed by an enemy. So if you want to hang out with a strange shadow creature that's really protective of ghosts for a couple of days, go for it, but its magic will disappear after a while. There will be a quest specific to death mages posted next month to try to use their magic in a ritual to create a path to help any that are stuck in Avalon, but many may remain for a year.

Any time you think your character has something that will have an affect on the outcome, regardless of whether negative or positive and it isn't reflected in the poll, feel free to comment it! That could've counted as a +1 for sure. We don't list outlying circumstances in prompts/polls just because there are so many that there could be and we don't want to limit peoples' creativity, but any time you aren't sure feel free to ask.

I hope I got all your questions, let me know if I missed something!