blocks wavelengths

In front of me Thorned Namshiel howled out in frustration and evident terror in some tongue I didn't know, and I saw that both Tessa and Hellmaid Rosanna had pulled a vanishing act. Namshiel, his arm outstretched in the general direction of the far side of the stone throne, added, despair in his voice, "Come back!"
Then he turned toward me as he heard my feet churning through the wet snow. He still held a corona of green lightning in his spiny hand, and as his eyes focused on my general location he bared his teeth in a snarl of bitter hatred and flung out his hand, hurling a sphere of crackling emerald electricity at me.
My shield bracelet was ready to go, and I had terror and rage and determination in plenty to empower my defenses. I deflected the sphere at an angle and sent it rebounding harmlessly up into the sky.
"Amateur puppy," Namshiel snarled, and began to gather more sickly green power at his fingertips. He made an odd little gesture and flicked his fingers, and suddenly five tiny threads of green light leapt toward me on five separate, spiraling paths.
I brought my shield around to intersect the new attack-and realized at the last second that each individual thread of energy was coming at me on a slightly different wavelength of the spectrum of magical energy, a variance of frequencies that my shield couldn't stretch to cover. Not all at the same time, anyway. I countered three of them and nearly got the fourth, but it slipped by me, and I never even touched the fifth strand.
Something that felt like cold, greasy piano wire wrapped around my throat, and I couldn't breathe.


Small Favor Chapter 43, Page 357-358