Devil King's Castle
The Devil King's Castle in KonoSuba is a jet-black fortress and army headquarters wrapped in a spirit barrier its Generals maintain, with the throne room seated on the highest floor.
Every campaign in KonoSuba points at the same distant address. The Devil King's Castle is the home of the Devil King and the operating base of his army, a vast multi-story fortress of jet-black rock standing in his territory beyond the Kingdom of Belzerg's frontier. Its real defense is invisible: a powerful spirit barrier wraps the structure, maintained primarily by the Devil King's Generals, which is why those eight monsters are bound to the place however far their errands range. Inside, the halls hold the elite of the monster army, and the Devil King's throne room occupies the highest floor. The Generals themselves have a reputation as poor tenants, lazing about the castle and manufacturing headaches for their king and his staff.
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