Namshiel

Namshiel, often called Thorned Namshiel, is a fallen angel, and a member of the Order of the Blackened Denarius. Harry Dresden calls him "Thornyboy". He is first seen, and is so far only in, Small Favor.

Powers & Abilities
Thorned Namshiel is a powerful and skilled wizard. Among the spells he's shown are: shooting sickly green lightning, generating gusts of wind, and summoning black, magic-disrupting threads.

He also demonstrated the ability to manifest sickly green threads that he can manipulate. He was able to alter the magical wavelengths of these threads so that Harry's shield couldn't stretch its magical wavelength to stop them all.

Thorned Namshiel also has the ability to shoot spines from his body.

His skills are a century or two ahead of that of Harry Dresden as evidenced by his design of a flawless Empowered Circle that could tap into a dark ley line to contain the Archive. His raw power allows him to call up Hellfire enough to burn through the defenders of Arctis Tor, calling forth massive amounts of heat in the heart of Winter.

In the Series
In Small Favor, as Harry rushes into the Shedd Aquarium to try and save Ivy from the Denarians, he nearly bumps into Thorned crouched on the floor under a veil working a spell. Harry disrupts his circle and flings the skull cup into a huge tank. The Denarian ate the force spell Harry threw at him. Then Thorned conjured a smoky prison from black threads he spewed from his mouth landing all around Harry. The prison-spell shatters Harry's shield and blocks all of his magic. — Some unknown power creates a silver hand construct for Harry, floating away from him and reflecting his movements. It breaks the prison and thrashes Thorny through several walls and glass ripping him to shreads, but not killing him.

Later in Small Favor, Mab says that she and the Archangel Uriel had a common enemy that day, that there was one among the Fallen who had to answer for the Hellfire attack on Arctis Tor. Harry remember the silvery hand and infers that Mab means Black Council and Thorned Namshiel.

Desciption
Harry describes him as basically humanoid, gaunt, skeletal, and grey-skinned. He has curved, very pointy spurs of bone jutting out from every joint. His hair was greasy and lanky hanging from his knobby skull. Two pairs of eyes: the human pair were brown, the demon pair were glowing green. He wore a heavy canvas messenger bag across his shoulder.