You will find an entrance to a tomb here, which is the domain of Neb-Kemi, the 'transformed high priest' referenced by the side quest The Corrupted Priest. Neb-Kemi is an undead sorcerer and protected by some Sandstone Guardian Statues. After defeating him, return to Amen-nahte in the Temple of Seti to complete the quest. The tomb itself also holds some minor treasure chests.