Nazrak

Nazark is an ancient, malevolent and powerful demonic warlock who acts as the central villain of the children's horror-series Are You Afraid of the Dark? episode "The Tale of the Magician's Assistant".

History
Nazark was introduced as a warlock from ancient times, sufficiently powerful and cruel to be considered a demon, long before the events of the episode he was banished into a void by an unknown power and could not return due to the magic wand which was used to imprison him, this wand would eventually fall to the protection of an aging magician known as Shandu.

Shandu would eventually hire an assistant by the name of Todd, who would come to learn that the wand had real magic properties and thus resorted to stealing it in order to help fix problems in his life, while he did so with good intentions (such as aiding his struggling mother) his theft would undo the shackles keeping Nazrak from entering our world and the monster emerged, seeking to capture the wand and throw the world "into a new Dark Age".

The demon would take many forms and displays of threatening magic to force Todd into surrendering the wand to him but would be undone by his own treacherous nature when Todd tricked the demon into a deal (which Nazark immediately broke the moment he gained the wand), only to get caught in his own magical assault when he fired at Todd, who cleverly used a nearby mirror to deflect the assault.

This would trap Nazark back in his prison and Shandu was returned to the living world, who had the wand once again locked away, preventing Nazark's attempted takeover of reality.