Place · Book 5, The Butcher's Masquerade
Sheol
'The mysterious 15th level of the World Dungeon', where Sheol Glass Reaper Cases are forged and sold by traveling Spider Reaper Minions, who also sell lollipops; a case can blast whoever opens it with the Sheol Fire spell.
Segment appearances
Arc
Named once, in the AI's account of the nine-tier attack: the celestials and 'their downstairs neighbors in Sheol found their destinies forever altered' (ch. 52).