Novel info
Overlord Belenus the Storm Hearld of change

the mc is a 26 year old man that was reincarnated as an baby godzilla Rin Firestone was reborn as Belenus the son of Amaterasu the legendary godzilla yes Amaterasu is a female while his system is unlike other systems having to merge world and universes to give power increasing his exp passively from the unintended deaths