Dreamscapes

Centered around Cassiopeia who is trapped in a place between realities called the dream realm. Her task is defending all the realities/universes from a force called "The Evil". She can never really die, but isn't a true immortal either. She's transported to different realities via "dreams" where she's tasked with hunting down The Evil. She usually appears wherever it is, and it doesn't take her long to find it. The Evil possesses the minds of people in power, guiding their hand in the destruction of that realm. If Cass is killed before she can take down The Evil, that realm will fall to its power. If she defeats it, The Evil is cast out and cannot return to that realm. Once she's completed her mission (or if she dies) Cass wakes up back in the Dream Realm. There her wounds will heal and her memory is slowly erased. She usually archives her experiences in a journal of some sort before this happens so she can look back on it.