Circle

I got low and stayed still and opened my senses.
First thing: I was inside a ritual circle, one that was currently functioning, being used for a spell. It wasn’t the cheap and quick kind I was used to, I guessed, or it would have been broken when I crossed it. Maybe it had kept its integrity because as part of the island, I already existed on either side of the circle. There were certain creatures who could move back and forth across boundaries like that without disturbing them in the slightest—most notably the common cat. It was one reason practitioners so often kept cats as house pets. From a technical standpoint, they are very magic-friendly. Maybe I hadn’t broken it because it had been set up in such a way as to consider the island’s Warden one of those creatures. Or maybe it was the continual, rippling, liquid nature of the circle itself.
Whatever the case, I was standing inside an active circle. Possibly the most active circle I had ever seen. Magic hummed through the air and the ground, so much that I felt my hair standing on end, and some primitive instinct-level awareness from the Winter Knight’s mantle, the same part that had given me so much trouble all day, started advising me to get the hell out of there along with the rest of the island’s animals. That was why my intellectus hadn’t been able to tell me what was happening here. As a form of magical awareness, an active circle had blocked my intellectus out. Now it worked just fine for what was inside the circle—it was everything outside of it that it could no longer touch.

Cold Days Chapter 47, Page 450


While that drama was going on, I thought furiously. I thought about the mighty spirit who was my ally, who was being held immobile and impotent. I thought about the abilities of all of my allies, and how they might change the current situation if they weren’t all incapacitated. Molly was the only one at liberty, and she had worn herself out over the lake. She wouldn’t have much left in her—if she appeared now, the fae would defeat her handily. She couldn’t change this situation alone. Someone would have to set things into motion, give her some chaos to work with.
I just didn’t have much chaos left in me. I was bone-tired, and we needed a game changer. The mantle of the Winter Knight represented a source of power, true, but Maeve had damned near talked me into joining her team when I’d let it have free rein. I wasn’t going to help anyone if I let myself give in to my inner psycho-predator.
If we weren’t all inside the stupid circle, at least I could send out a message, a psychic warning. I was sure I could get it to my grandfather, to Elaine, and maybe to Warden Luccio. But while I was sure a mud coating could get us out of the circle, there was no way the fae would give us time to coat ourselves and do it. We were effectively trapped in the circle until sunrise, just like a being summoned from the Nevernev—
Wait a minute.
Circles could be used for several different things. They could be used to focus the energy of a spell, shielding it from other energies. They could be used to cut off energy flows, to contain or discorporate a native being of the Nevernever.
And if you were a mortal, a genuine native of the really real world, they could be used for one thing more: summoning.
The hilltop was one enormous circle: one enormous summoning circle.
“She is not here,” Maeve was ranting. “She sends her hand to deal with me? So be it. Let me send her a message in reply!” The little automatic swiveled toward my head.
I shouted as swiftly as I could, putting whatever will I had left into the shortest and most elemental summons there is: “Mab! Mab! Mab! I summon thee!”

Cold Days Chapter 51, Page 487-488


It’s impossible to know how something is going to arrive when you summon it.
Sometimes it’s huge and dramatic, like it was with Titania. Sometimes they come in a burst of thunder or flame. Once, this thing I’d summoned arrived in a shower of rotting meat, and it took me a month to get the smell out of my old lab. Less often, they simply appear, like a slide-show image suddenly projected on the wall, drama-free.
Mab came in a bell tone of sudden, awful, absolute silence.
There was a flash—not of light, but of sudden snow, of frost that abruptly blanketed everything on the hilltop and gathered thick on my eyelashes. I reached up a hand to flick the snowflakes out of my eyes, and when I lowered it, Mab was there, again in her crow black dress, with her midnight eyes and ebon hair, floating three feet off the ground. The frost was spreading from her, covering the hilltop, and the temperature dropped by twenty degrees.
In the same instant, everything on the hilltop ceased moving. There was no wind. There were no fitful drops of rain. Just pure, brittle, crystalline silence and a sudden bleak black presence that made me feel like hiding behind something, very quietly.
Mab’s dark, bleak gaze took in the hilltop at a glance, and stopped on Lily and her supporting coterie. Mab’s left eye twitched once. And she spoke in a low, dreadfully precise voice. “Cease. This. Rudeness. At once.”

Cold Days Chapter 52, Page 490