Cannon: Piercing Bullets Attack

Cannon: Piercing Bullets Attack (機関砲・貫弾撃 Kikanbō: Kandangeki) is an Iron-Make spell.

Description
A very strong Iron-Make spell: the user gathers long and big pieces of metal or creates planks of iron and through magnetism bend them several times until they gain the shape of giant boulders. Then, they release them from every direction, severely damaging the targets and the surrounding environment.