Noah Ophis

Noah Ophis is a Gorgon that went about a killing spree and evaded Team Free Will to

History
As he opens the door, he is surprised to see Castiel and realized his powers didn't work since the latter isn't human and tries to flee as Jack Kline (Nephilim) appears, further surprising him. Noah fights the duo and manages to overpower them before Sam and Dean arrive.

Surprised at meeting the hunter formally, Noah greets Dean who attacks him but is knocked aside along with Sam. Noah grabs Dean and bashes his head on a counter, knocking him out. He also paralyzes Castiel when he intervenes. With the hunters occupied, Noah goes to leave but is promptly beheaded by Jack, ending his spree.

Trivia

 * He is one of the few monsters to kill be Jack.
 * He is the first Deities, Jack killed.