Level: 11. Obelisk of Khamoon
Artefact 1/4. After taking the Eye of Horus you jump into the pool. Then leave the courtyard.
The corridor leads you to the room, where is gear with gold ear. Climb to the top of the room. In one of the upper levels you will find a lever - switch it.
Above you will pull ahead a bar. You have 90 seconds to go there. Climb to the top of the room as you come to the place, where is a column with shooting darts. Turn right.
Jump above the bar on the part of the flooring on the right. Near the columns, hidden behind stones is Artefact 1/4. Take it and go to the exit of the room.
Artefact 2/4. You're in the room, where is gold ear (on the left side from the entree). After activating the gear, slide on the bed of the chamber.
On the same side as the entree, but lower is entry of the corridor. Get there, then turn left and jump on the stone shelf. On the left side is movable blade.
When the blade is going away jump on the ledge and quickly move to the left.
When the blade closes again to you, fall on the ledge below. Then, when the blade goes away jump on the former ledge. From this ledge jump to grab the edge of the shelf above you.
Get on the shelf. Stand on the its end. When the blade is going away again, jump to the ledge below. Wait as the vertical movable shields are moving up. Jump to grab the ledge on the left.