blood fog

I gritted my teeth until they creaked and got my feet underneath me. She was right. The oncoming voices were close. Someone, Benn again, I thought, shouted out orders not to move. If Tera tried to clamber over the fence now, she'd be a perfect target at the top. The pursuers were too close. Tera didn't stand much chance of escaping, and if she didn't, I wouldn't make it far. I'd be caught, and in more trouble than ever - and MacFinn would be on a rampage, with no one to oppose him.
I blinked sweat out of my eyes and knelt down as my blood pattered to the sidewalk. Little curls of steam came up where it hit the cold concrete.
I took a breath and drew in every bit of will I could summon, drew in the pain and my fear and sick frustration and shoved it all into a hard little ball of energy.
"Ventas veloche," I murmured. "Ubrium, ubrium." I repeated the words in a breathless chant, curling my fingers in toward my palm as I did.
The curls of steam from my blood began to thicken and gather into dense tendrils of mist and fog. Back along our trail, where more of my blood had spilled, more fog arose. For a few seconds, it was nothing, just a low and slithering movement along the ground - and then it erupted forth, billows of fog rising to cover the ground as the energy rushed out of me, covering Tera from my sight and causing shouts of confusion and consternation to come from the law officials pursuing us.
I dropped to my side, overwhelmed by pain and fatigue.
There was a whisper of sound, a creak of wrought metal, and then a light thump as Tera West landed beside me, invisible in the fog though she was only a few feet away. She moved toward me, and then I saw her expression, her eyes wide with wonder, the first emotion I had seen on her face.
"Wizard," she whispered.
"Don't wear it out," I mumbled. And then everything went black.


Fool Moon Chapter 13, Page 143-145