Original prompt: Cthulhu as a college teacher.

Revised prompt: A creature resembling a giant humanoid octopus, with a large, bulbous head resembling a mass of feelers, teaching a college class. The creature, despite its formidable and unconventional appearance, is wearing a tweed jacket with elbow patches, the typical attire of an academic, and holding a chalk in one of its tentacles. He is standing in front of a blackboard, energetically explaining some complex concept as the students listen in awe and curiosity.