Description
Dagon's power over water and oceanic phenomena. In his evolved form, the technique generates tidal waves, water barriers strong enough to deflect grade 1 attacks, and aquatic shikigami resembling deep-sea creatures. The water itself is cursed, making even contact with it dangerous.
As a cursed spirit born from humanity's fear of the ocean, Dagon's technique embodies the helplessness of being caught in open water with things swimming beneath you.
Usage in combat
Dagon evolved from a harmless cursed womb into a full special grade during Shibuya, unlocking Disaster Tides' true potential in the process. His water shields stopped attacks from Naobito, Nanami, and Maki, three sorcerers who should have overwhelmed a newly formed spirit.
The technique's domain expression, 
Horizon of the Captivating SkandhaHorizon of the Captivating SkandhaDomain ExpansionThe cruelest visual joke in jujutsu: Dagon's domain looks like paradise. Endless tropical beach, crystal waters, perfect sky. Then the fish start coming. Death Swarm shikigami pour..., turned the water theme into a tropical beach with endless shikigami. The irony of dying on a beautiful beach while fish eat you alive captures the essence of what cursed spirits are, humanity's fears wearing pleasant masks.
Dagon was ultimately killed not by any technique but by Toji's resurrected body, which had zero cursed energy and fought on pure physical ability. The most powerful water sorcery in the series was beaten by a man who couldn't even see cursed energy.
Domain expansion
Disaster Tides' domain expansion, Horizon of the Captivating SkandhaHorizon of the Captivating SkandhaDomain ExpansionThe cruelest visual joke in jujutsu: Dagon's domain looks like paradise. Endless tropical beach, crystal waters, perfect sky. Then the fish start coming. Death Swarm shikigami pour..., takes the form of a sunny, tropical, picturesque island. It can even be used for recreational activities, something that was taken advantage of by 
KenjakuKenjakuHumanAn ancient sorcerer who has survived for over a thousand years by transferring his brain into different host bodies. Each body grants him access to that person's innate technique w... and 
MahitoMahitoSpecial Grade · Cursed SpiritA cursed spirit born from humanity's hatred and fear of each other. Mahito's Idle Transfiguration allows him to reshape souls through physical contact, and since the body follows t....
