Abraxas

Abraxas, also referred to as the Big Man, was an organic/mechanical hybrid.

Biography
According to one account, Abraxas was created by the Sodality. (PROSE: Child of Time) According to another, however, he was built by a girl named Jasmine. (PROSE: Recursions)

He was used as a henchman by Mestizer. After an incarnation of the Doctor arrived on East London, he was attacked by Mestizer and had his Cabinet of Light stolen by Abraxas. (PROSE: The Cabinet of Light)

Appearance
Abraxas was around eight feet tall, and bullet-proof. His body was mostly covered by leather, including thick black gloves for his hands and a tight leather hood around his head. (PROSE: The Cabinet of Light)

Behind the scenes
Upon writing Recursions, Time Hunter editor David J. Howe purposefully chose to give Abraxas a different origin story, citing that "if Terry Nation can have three (at least) different stories of the creation of the Daleks, why couldn't [he] have two for Abraxas?" (REF: talespinning: Recursions author's notes)