Demon King Castle Delzogade (魔王城デルゾゲード, Maō-jō Deruzogēdo) is Anos's castle 2,000 years ago. It is now used as the Demon King Academy.
2,000 years ago, Anos killed the God of Destruction Aberneyu and turned him into the castle Delzogade.
Main article: Arena
Second Training Classroom
The students took their dungeon test for finding artifacts here.