Scratchman

Scratchman, known as Scratch to his friends and understood as the Devil by the Fourth Doctor, was a pan-dimensional form of energy who fed off the emotional vulnerabilities of others, giving them a little power in return. He ruled his alternate dimension for millions of years. Over the last thousand years, a small rip appeared between his dimension and N-Space, allowing him to send a scarecrow virus to an island on Earth.

He appeared as a man in a suit with a globe of white fire for a head. (PROSE: Scratchman)