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 reach to zero will be sent into the Abyss.

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