Please please please rec me some Long/Epic SPN AU fics... (AU as in completely different kind of world/universe, whether Hunter exist or not is fine)

as long as it's GEN and has Sam&Dean being brothers and all BAMF, I'll take anything
crossover & self-rec are ok
the longer the better ;)

Fairy tales, medieval, sci-fi, military, anything are fine.
(I've found a really nice Kingdom Hearts xover, so game world definitely are ok too)
I've been reading plenty of them, but it's difficult to find anything Gen AND long AND focused on the boys

thankthankthankthankyou before
I'm in the middle of mountains of repetitive-and-boring-yet-has-to-be-finished job and in need of fresh story to escape a bit ;)