Keppu San'u

Keppu San'u (lit. "Hideous Rain of Blood and Wind") is a  Noble Art of Shizuku Kurogane.

Description
Keppu San'u is a Noble Art, that lets the user form thousands of water spikes from a massive amount of water, which can then be launched towards the opponent. The small spikes are comparable to bullets in terms of power, and they are fired to all directions, making dodging them even more difficult.

Weakness
Due to the attack targeting the whole vicinity around the user, it will hit everyone around the user. However, Shizuku is capable of protecting those around her, by surrounding them with a water barrier.