Dagon

Dagon is a Special Grade cursed spirit born from humanity's fear of the ocean and water-based natural disasters. Initially appearing as a docile, octopus-like creature, Dagon evolved into his true form during the Shibuya Incident — a powerful humanoid curse capable of trapping multiple Grade 1 sorcerers in his lethal domain at once. His Domain Expansion floods the battlefield with endless shikigami, overwhelming opponents through sheer numbers.