I'll be on in a minute, I'm just sharpening my blade
Don't fall for his flattering tune
He'll promise you the world until you drink that perfume

This is Amundsen, stage magician, psychopath, and killer. He'll promise you the world, but once you're under his spell he'll suck everything out of you and leave you a broken husk. If you're lucky enough to survive, that is!

I was heavily inspired by the song Neon Medusa, by The Midnight. It's also where his name is derived from.

Art by the fabulous Berch Bork (@berchbork on Twitter)
Based on an adopt from  zirah I believe