Cuts off Nevernever

"We were betrayed," she said, and her words carried more sharp edges than a sack of broken glass. "Someone within our ranks must have reported our position to the Red Court. They attacked us that night."
"When was that?" I asked.
Luccio frowned, then glanced across the table at Ramirez.
"Three days ago, Zulu time," Ramirez provided quietly.
"I've not slept," Luccio said. "Between that and all the travel, I lose track." She took another drink of ale and said, "The attack was vicious.
They were coming for the Senior Council, and their sorcerers managed to cut us off from escaping into the Nevernever for nearly a day. We lost thirty-eight Wardens that day, in fighting all over Sicily."
I sat there for a moment, stunned. Thirty-eight. Stars and stones, there were only about two hundred Wardens on the Council. Not every wizard had the kind of talent that made them dangerous in a face-to-face confrontation. Most of those who did were Wardens. In a single day, the Red Court had killed nearly 20 percent of our fighting force.
"They paid for it," Morgan rumbled quietly. "But... they seemed almost mad to die in order to kill us. Driven. I saw four different death curses unleashed that day. I saw vampires climb over mounds of their own dead without so much as slowing down. We must have taken twenty of their warriors for every loss of our own." He closed his eyes and his sour face was suddenly masked with very real and very human grief. "They kept coming."
"We had many wounded," Luccio said. "So many wounded. As soon as the Senior Council was able to open the ways into the Nevernever, we retreated to the paths through Faerie. And we were pursued."
I sat up straight. "What?"
Morgan nodded. "The Red Court followed us into the territory of the Sidhe," he said.
"They had to know," I said quietly. "They had to know that by pressing the attack in Faerie itself they would anger the Sidhe. They've just declared war on Summer and Winter alike."
"Yes," Morgan said in a flat voice. "But it didn't stop them. They attacked us as we retreated. And..." He glanced at Luccio as if in appeal.
She gave him a firm look and said to me, "They had called demons to assist them." She inhaled slowly. "Not simply beasts from the Nevernever. They had gone to the Netherworld. They had called Outsiders."
I took a longer drink of Mac's ale. Outsiders. Demons were bad enough, but they were at least something I was fairly familiar with. The reaches of the Nevernever, the world of spirit and magic that surrounds the mortal world, are filled with all kinds of beings. Most of them really don't give a damn about mortal affairs, and we are nothing but a remote and unimportant curiosity to them. When beings of the spirit world are interested in mortal business, it's for a good reason. The ones who like to eat us, hurt us, or generally terrify us are what wizards commonly refer to as demons, as a general term. They're bad enough.
Outsiders, though, were so rarely spoken of that they were all but a rumor. I wasn't really clear on all of the details, but the Outsiders had been the servants and foot soldiers of the Old Ones, an ancient race of demons or gods who had once ruled the mortal world, but who had apparently been cast out and locked away from our reality.
There was a specific Law of Magic against contacting them-Thou Shalt Not Open the Outer Gates. No one wanted to be the one suddenly suspected of opening ways for the Outsiders to enter the mortal world. The Wardens absolutely did not play around with violations of the Laws of Magic. Their entire purpose in life was to protect the Council-first from violators of the seven Laws, and then from everyone else.
I eyed the folded grey cloak on the table in front of me.
"I thought only mortal magic could call up Outsiders," I said quietly.
Luccio said quietly, "You are correct."

Dead Beat, Page 275-277