The torrent of water being manipulated by Acqua's magic passed through the ceiling and formed itself into a giant large hammer; Kanzaki mercilessly used her steel wires to quickly slice it into pieces. The machinery-shaped, several-ton block of water instantly dispersed into steam, where it was again controlled by Acqua, formed into diamond-like things.

Acqua did not just control a "hammer".

The entire two kilometer stretch of the 4th level could be said to be under Acqua's absolute control. All water flowing through the artificial streams was siphoned out, every single drop floating in the air before becoming fine strings and scattering across the school, forming a complex and unfamiliar magic array.

The water was shaped countless different arrays and continued to interchange, changing shape and form to create various types of arrays for the singular purpose of serving Acqua's will.

Multiple attacks came at Kanzaki.

Ice spears thirty meters long flew towards her.

Water whips attacked Kanzaki from every direction.

Massive, spherical blocks of ice intercepted paths with one-another.

Toaru Majutsu no Index vol.16