The gold saw that Marian immediately swung passed by Kumokawa’s legs by only a few millimeters and her heel shot up toward Marian’s jaw. A dull noise rang out. She swung the gold saw and hammer again, but Kumokawa Maria’s legs were no longer there. The weapons merely flew through empty air.

[...]

Kumokawa Maria spun her body while still upside down. Her legs wrapped around Marian Slingeneyer’s right leg.

That had been outside what Marian had expected.

With the threat of the gold tools, Kumokawa should not have been able to make that attack.

She had gone for something other than a blow.

She had used a locking technique.

Without knocking her opponent to the ground, Kumokawa Maria started to destroy Marian Slingeneyer’s right leg while the brown girl still stood.

A dull noise passed through Marian’s body and exploded in her head.

[...]

“I didn’t get to the bone,” said Kumokawa Maria as she stood up by swinging her legs around like a break dancer and wiped nervous sweat from her brow. “But it looks like I did damage the tendon.”

[...]

“It’s true that I may be no match for you with no materials.”

Marian Slingeneyer swung her gold saw. She was not aiming for Kumokawa Maria. She swung the tool in a large circle, damaging the floor, walls, and ceiling as it passed.

Toaru Majutsu no Index New Testament Vol.4 main.20