Olympus
You arrive at the famous gates to the even more famous Olympus. You hurry to catch up with Owl who is already running through them.
He tells you that Cerebeak is not a normal foe. His powers are vast and insidious. He has a hunger that has never been sated, but unlike monsters and gods and even Baal he feeds beyond the physical realm. Cerebeak eagerly devours thoughts and nightmares and fears.
Luckily, the Greek pantheon who has gathered at Olympus is no stranger to battle. The gods here are eager to help see Cerebeak brought low.
(Image and story given for flavor and not relevant to any puzzle)