Vento moved back a bit as she casually swung the hammer vertically and then horizontally. The chain attached to her tongue jangled while shaking almost as if being swung around. The hammer’s trajectory just barely grazed the tongue chain. Sparks had actually flown from it a few times.

[...]

Vento’s hammer ripped through the air.

An explosive noise pounded at Kamijou’s ears.

The hammer was like a bat that launched heavy metal balls. A table was blown away, the floor was torn up, and the limbs of the collapsed men in black were blown off and landed on top of the collapsed customers. That filled Kamijou’s head with rage, but he had his hands full dealing with the wind weapons flying his way.

Toaru Majutsu no Index vol.13 ch.7 pt.7