Board Thread:General Discussion/@comment-35281533-20180411210145/@comment-36075550-20180720135318

Well, to be honest, I think they mean Sinbad is the first person to conquer a dungeon during his era.

Magi only appear and rise dungeons when the world is in time of need.

And, I'm guessing that there were dungeons 200 years ago, and then disappeared when the abnormalities decreased. And, then people in Sinbad's era thought they were only legends since it was 200 years ago and people didn't bother to really write about dungeons (because people were intrigued when Sinbad and His Adventures came out, meaning that people didn't write dungeons). Also, Baba was shocked to find out that the Magi still existed and she's really old.