Surviving in Ragnarök as Hades!

After being killed by a pebble, A man from earth gets sent into the Record of Ragnarok with the Rebirth System! “Eh…How am I going to survive in this hell hole! wait…I'M HADES?!” “Alright, I have around 14 billion years before Ragnarök, let's make these years count!” - - - AN: Yes this fanfic will be a multiverse story. A large portion of it will take place in the RoR universe but since the story is more focused on fights for the majority, a lot of it will be of my own creation as well. I will try to keep his personality similar as shown in the manga but Hades only got like 10 chapters of screen time so I’ll be adding my take on him as well. Please do note that my grammar will not be the best. Yes, English is my first language but I just suck at spelling so please bear with me.