The two Saints took decisive action and a tremendous wind roared.

[…]

The great noise came from Ollerus as he cut between the two Saints.
But due to the fairy spell, he did not possess any of his special power from being near magic godhood. The strength of his body and the magic he could use were both weaker than the average magician’s.
His will made up for what he lacked.
The action he took was simple. He enclosed his arms around the large sword Brunhild swung down. However, he could never stop an attack launched at the speed of sound. The incredible friction tore his hands to pieces.
Even as his hands continued to be destroyed to divert the path of the large sword, he moved those hands.
He tugged so as to pull the sword and Brunhild toward him. He had the sword cross paths with Silvia’s empty-handed strike.
“What!?”
“Ollerus!! You idiot!!”
The women spoke up in surprise, but it was too late.
A great roar rang out. To someone watching on, it may have looked like the two Saints collided at frightening speed and collapsed into the deep snow.
The two Saints had been defeated at the cost of Ollerus’s arms.
Those arms fluttered in the wind like plastic string and it was clear the damage had gone well beyond a broken bone.

Toaru Majutsu no Index New Testament vol.10 ch.18 pt.3 q