janesfoster:

AU: On one of the many adventures that the sons of Odin led thorough out the realms, Sigyn, wife to Loki and Goddess of Fidelity, suffered injuries that not even a god could overcome. She left Loki only with a promise that one day, they would get a chance to find each other again. Many centuries later, Jane Foster came to Asgard on the arm of Thor, and the aether swimming insider her. Odin told her of a grim fate, that the aether would kill her and that there was nothing that could be done. The ever resilient person that she was, refused to accept this fate. And so she sought out the only person she believed could help her, Loki. They led a journey into Svartalfheim, seeking out someone that could bring the aether out of her. Though, Jane was ever the mortal that she was born as. The aether took a toll on her body, and through her pain, it was discovered that Jane was not as simple as she appeared. Sigyn had kept true on her promise, reincarnated into a mortal, Jane.  (requested by starzangelus)