Magic 18 Volume 4

"Keppu San'u[15]."
Churning the enormous mass of water, she had it form spikes like a hedgehog.
"Fire volley."
The thorns of water fired in all directions without any attempt at aim. In a second, many thousands of high pressure water bullets drilled through the entire battlefield, cutting through concrete.
It was a quantity of water incomparably greater than what she used in the fight against Raikiri some time ago. But it was no wonder. Raikiri used lightning. In order for Shizuku, who used water, to fight against that, she would have to make all of her water pure in order to insulate herself from electricity. Because of that, the quantity of water she could use at the same time was limited.
However, right now there was no similar limit. The amount of water Shizuku could use was several hundred times greater than in the fight with Raikiri. The floor of Akatsuki Academy's underground training arena, the walls, the ceiling—every nook and cranny, had been filled with holes!