The first one to produce a dumbfounded expression was Westcott.

He slowly looked down and saw that piercing his side.

“Westcott’s magical ability was said to be not all that great,” explained Mina. “At least when compared to true eccentrics such as Mathers and Crowley. …And yet he still managed to control a powerful faction as one of the Three Founders thanks to his quasi-immortality.”

“Quasi…immortality…?”

“I will omit what exactly that entails. But I will say that he specialized in forging documents. And as a coroner, he had the opportunity to contact more corpses than the average person. Also… in our world, parchment was used to converse with demons and transfer souls. But Crowley stabbed straight through that assumption with an attack using the treasure he had brought from Blythe Road.”

[...]

“B-bhboh…”

Westcott had never doubted the absolute strength of his quasi-immortality and he was unable to even pull out the thin arrow now that it was taken from him.

“Bhbohbhaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh!!”

Toaru Majutsu no Index New Testament vol.18 ch.3 pt.13