Mosquito Noise

Mosquito Magic: Mosquito Noise (モスキート魔法『モスキートノイズ』) is a Mosquito Magic spell.

Description
With an open grimoire, the user generates several large metallic needles and scatters them around an area. The needles produce a high-pitched squeal that debilitates the target.

The needles could also be used offensively as projectiles, strong enough to pierce stone.