Hahahahaha, I just love this picture. Alex/Jace looks so unamused by anything trying to threaten him.
From Chapter 4 of The City of Bones.
Jace explains to Clary the abilities of demons:
"That thingthe monsterit talked." Clary was shuddering uncontrollably.
"You've heard a demon talk before." Jace's hands were gentle as he slipped the strip of knotted cloth under her neck, and tied it. It was smeared with something waxy, like the gardener's salve her mother used to keep her paint- and turpentine-abused hands soft.
"The demon in Pandemoniumit looked like a person."
"It was an Eidolon demon. A shape-changer. Raveners look like they look. Not very attractive, but they're too stupid to care."
"It said it was going to eat me."
"But it didn't. You killed it." Jace finished the knot and sat back.
To Clary's relief the pain in the back of her neck had faded. She hauled herself into a sitting position. "The police are here." Her voice came out like a frog's croak. "We should"
"There's nothing they can do. Somebody probably heard you screaming and reported it. Ten to one those aren't real police officers. Demons have a way of hiding their tracks."
"My mom," Clary said, forcing the words through her swollen throat.
"There's Ravener poison coursing through your veins right now. You'll be dead in an hour if you don't come with me." He got to his feet and held out a hand to her. She took it and he pulled her upright. "Come on."
The world tilted. Jace slid a hand across her back, holding her steady. He smelled of dirt, blood, and metal. "Can you walk?"
"I think so." She glanced through the densely blooming bushes. She could see the police coming up the path. One of them, a slim blond woman, held a flashlight in one hand. As she raised it, Clary saw the hand was fleshless, a skeleton hand sharpened to bone points at the fingertips. "Her hand"
Alex Pettyfer as Jace Wayland.
This picture is from Operation Stormbreaker.