Swords vs Titanic Bronze

“She wears Titanic bronze,” the Erlking said in a tone that suggested he had said it several times in the past couple of hours.
I held up a hand. “Question from the classroom floor. What is that, exactly?”
“A unique alloy of Olympian bronze and mordite,” Vadderung replied. “Kinetic weapons will be of very little use against her. Elemental energies will do little more. It will take a being of divine status to physically penetrate the armor.”
“Divine status,” I said. “Meaning what?”
“Your Knights, perhaps,” the Erlking mused. “Their power would seem to be of the proper origins.”
“Those angels you mentioned could do it,” Ebenezar said. “Mordite is condensed from the darkest, most evil stuff of the Outside. Once it’s alloyed, instead of devouring life it devours energy. Heat, force, lightning, what have you, all backed by the will of the being wearing it. Getting through that takes more than simple power.”
“It has to come from the proper source,” Vadderung agreed. “And be used for the proper reasons.”
Mab glided up to the table. “Sufficiently infernal power could manage the task as well,” she murmured. “I daresay Nicodemus Archleone might strike through Titanic bronze.”
“Assuming she just stands there and lets any of those beings attack her,” the Erlking pointed out. “In the first place, those assets are not under our command. In the second place, she won’t. She’ll do battle, and most likely kill them.”
Vadderung scowled up at the Erlking for a full five seconds before he said, “You’re gloomy.”
“Merely realistic,” the Erlking said.
“You’re saying that to get to her, we’d need a sponsor,” I said. “And that basically no one around here is strong enough or on the right frequency enough to sponsor that kind of thing.”

Battle Ground Chapter 6, Page 56-57