In the reported account of al-Sakkaki, death is first imagined as analogous to a predator; then a hypothetical image resembling an animal’s claws is constructed for death. This is not a literal anatomical property but an imaginative representation.
The argument does not deny the real existence of claws in animals. It concerns an imagined claw-like form attributed to death. Calling that representation “claws” follows the rhetorical picture.
This reading requires separate attention to the transferred expression and to the context that directs it away from its ordinary reading.