Typhon's offspring are scattered across the world; among them are demons, and others are ancient evil creatures.
The former's strength is akin to the Titans; they are not deities, lack authority, but possess unique abnormal powers not inferior to the latter.
Those with abnormal powers that even gods find difficult to unriddle are the well-known great demons.
Conversely, the wandering ancient evil beings of this world, despite having various abilities, often lack such absoluteness.
To put it more precisely, those ancient evil beings are not 'mechanism monsters'. Their only common and formidable ability might just be the formidable undying nature stemming from the source of their strength.
The Sphinx is a demon, hence it only possesses the abnormal powers of a demon, lacking the robust vitality of evil creatures; it is not a deity, and thus cannot draw upon the faith that has been accumulated over millennia.