Task: Text Categorization
Input (English): This god was once retrieved from a pillar in a palace at Byblos that later represented this god's spine as the Djed pillar. During the Ptolemaic period, this god was replaced with a Greco-Egyptian hybrid called Serapis. This ruler of Duat wore the Atef crown and was commonly depicted as a (*) green-skinned mummy holding a flail and crook. His brother sealed him in a coffin with molten lead and dismembered his body into fourteen pieces, after which his wife Isis recovered thirteen of them. For ten points, identify this god who was killed by Set and became the Egyptian god of the underworld.
Output (English): Social Science