Talk:Bondrewd/@comment-29174245-20180721070623/@comment-2001:7C7:2052:109:F843:CC0D:B044:6A3B-20181105233820

The Abyss itself also found 1900 years ago by the current civilisation according to the first episode of the anime, so there must be some sort of wipe out in every 2000 years. On the first (or second, I'm not shure) layer they see some balloon catcher machine from the past, they were also 4000 years old. Maybe the Abyss gets deeper, and deeper every 2000 years with a humanity reboot?