I actually like how Op the Mc is, because I don't have a problem with a character being Op I have I problem with how most series handle the Opness (😏) so I hope you handle it correctly
Personally I would have chose a system that allowed me to get the powers of any char that dealt with the concept death and one of the essences.
Chuckling, the Source said, "Divine adaptability and the gift of jack-of-all-trades. You have received powerful allies indeed. Now go - your new life awaits beyond the veil!"
The Story is really good and I like how it's not moving slow, but the main problem I have is that there is too many abilities and things going on. I suggest mixing most of the fire abilities into simply "fire manipulation" and moving a bit slower
The idea is very intriguing and I'd like to see a full story, but the writing quality is sub par at best. some ways to fix this is by making the dialog and character pov separate paragraphs, and try to make paragraphs shorter or split them.