Demon Dragon's Tidal Wave

Demon Dragon's Tidal Wave (悪津波竜 Ryūma no Hōfukuha) is a Ice Dragon Slayer Magic spell.

Description
After the user has eats ice produced by Ice Devil Slayer Magic, they gather red ice in their left hand whilst gathering standard Ice Dragon Slayer Magic ice in their right hand. By swiping their arms in a circular fashion, the user creates a powerful blast of ice, which destroys a large area and barrages the target with devastating force. This spell was able to defeat Nagisa's opponent Akuma Baston.