Tentacle Downpour (降り注ぐゲソ - Furisosogu Geso) is Yagyū's Aerial Secret Ninja Art in Senran Kagura Burst. It costs one bar of Ninja Art Energy to use and requires Yagyū to be in the air. Yagyū becomes able to use it after getting to level 15.
While in midair, Yagyū floats about with her bladed umbrella before making a gesture with her hand and generates several knives made of ice. She then swings her bladed umbrella down and causes the knives to rain down on her enemies.