Long Snake Epiteo (長き蛇エピテオ, Nagaki Hebi Epiteo) is the spirit born from the rumors and folklore of a snake that is longer than anything else in the world.
Epiteo has the appearance of a snake.
When it was born, it could only wrap around the world once; but as the rumors spread, it is now big enough to encircle the world about 333 times. Epiteo grew so long that it could only live in the Spirit School's magical swamp now. However, it is said that Epiteo's head would pop out from the seven seas from time to time.
- Epiteo might be inspired from Jörmungandr, the World Serpent from Norse mythology.
- Maou Gakuin Web Novel, Arc 4, Chapter 25