A hero in the Dungeon? (Danmachi x MHA)

[Old Version] A new version of the story is on the way! Read to find out!

Danmachi: the black lightning hero

bell may not know but oranio has a hero who they call the black lightning hero who was the soul inspiration to become stronger to many adventures however many say he is a spiritual being or a new stronger species than any other some even say he is a physical entity of past adventures power combined but what if i told...