"Tartarus is only known in Hellenistic Jewish literature from the Greek text of 1 Enoch, dated to 400–200 BC. This states that God placed the archangel Uriel "in charge of the world and of Tartarus". Tartarus is generally understood to be the place where 200 fallen Watchers (angels) are imprisoned." Wikipedia
Done in photoshop cs4 + wacom bamboo.