The Morpheus Beast is an enemy in Chains of Olympus.
She appears as a gigantic gray smilodon with a human-like face and is partially concealed in dark fog. The Morpheus Beast often appears by emerging from the black fog of Morpheus. She attacks Kratos by striking at him with her claws, pouncing onto him, or breathing shadowy flames at him. Kratos can kill the Morpheus beast by latching his blades onto her, getting up onto her back, then impaling her in the chest and cutting her open.
Much later in the game, Kratos will encounter a similar, stronger enemy, known as the Sphinx.