Khepri's Amulet (Side Quest)
One of the miniquests that comprise the Shield or Blade sidequest in the Duat realm. Scan for the required amulet at the high pillar in southernmost Duat.
Climb to the the top. There is a path (marked by clumps of lootables, so you can scan ahead with your animus pulse), or you can simply scale the rockface. Either way, grab an amulet from the table at the tippy-top to complete the mission.
Note that there is a treasure chest here as well, but it does not count toward any location goals.