Abyss

Abyss (アビス Abisu) is a mysterious place which was stated to be a place where it'll suffering worse than death. Anyone who has it's count reaches zero will be sent into the Abyss.

It's later revealed that Abyss is actually a ruined Japan country caused by Abandonment War, and lives by a bunch of children who's not chosen by Althing. Due to the lack of resource, Abyss has only a few people living in the country. The country is ruled by Sakai Tokikaze, the King of Abyss and the Blink Baron.

Unlike Althea, Abyss still has some of the Modern Technology such as the nuclear weapons and airplanes exist.