there is literally nothing i hate more than calling something "Chapter 0" and then filling it with all the context necessary for the next chapter to make sense.
if i need to read the chapter before chapter "1" for it to make sense, it's not chapter 1, its chapter 2
only season previews and shit should ever be called chapter 0. the whole point of it being 0 is that you can skip it but YOU CANT SKIP THIS or chapter "1" drops you in the middle of nothing and references shit youve never heard of in relation to nothing you know. and then you have to go back and restart from the real beginning. infuriating.
I think the spell that he cast is to preserves his soul and repaired the damaged body in a frozen state, maybe there's something wrong with the activation and instead of woke up in his original body, he woke up in somebody's else body