What on the D&D Earth is this?

The Dungeons and Dragons movie is 21 years old this year and after a 9 year hiatus there is 4th movie in production.  Hollywood does love a reboot.

However, The thing that has been bugging me for the last two decades is...

What the hell is Phil Cornwell supposed to be?

Phil Cornwell as uncredited Purple Humanoid

Obviously someone spent a whole heap of effort to design the prosthetics that Phil wore (you can't disguise his voice though) but I don't know of any civilised humanoid race which matches his description.  I do think he is kind of cool though. 

Is he supposed to be a triclops? Perhaps he is supposed to be some form of demi-beholder?  What is the purpose of the third eye? what is that vestigial fin on his head? why is he purple?

Answers (and any homebrew builds) in the comments box below.

My favoured explanation is that he is the product of some ill conceived magical experiment fusing the DNA of Mick Jagger with Xanathar?

What if Mick Jagger and Keith Richards ran a corner shop?

Of course this comes several months after the sad passing of John Sessions who was a long time partner of Phil during the 80s alternative comedy explosion.  Mick and Keith's corner shop on Stella Street holds a very dear place in my heart.  He is sorely missed but I will immortalise them both in my RPG campaigns.  Mick & Keef's Magical Emporium & Shoppe of Convenience.

Phil Cornwell (Mick Jagger) John Sessions (Keith Richards) - Stella Street