The Mummy's Curse World Change/Spoiler

Go to Ankrahmun and head out of town to this ramp here. Go up the ramp and directly north and down into the tombs below. The Pharaoh Horestis resides in this tomb and is protected by many creatures.

You can try to tame Sandstone Scorpions in order to mount them.

There are Ornate Canopic Jars around the tomb that seal Horestis' burial chamber. If these are broken with a Crowbar Horestis will be awakened and you will have to face his wrath. If he is killed his death curse will strike the land and his servants will no longer roam the tomb but crawly creatures will swarm the desert north of Ankrahmun. The curse will lose its power over time, though: the jars will be restored, Horestis will return to his resting place, and the tombs will be crawling with his servants again. Till the next grave robbers dare to disturb his sleep...