Entrance into the Obelisk

This quest is initiated by examining a scroll next to the skeleton at the entrance of the Obelisk of Lost Souls (-6.96, +623.17, +142.41). It unlocks the keys to progress within the zone. You must slay the following monsters:

Soul Harvester Kul: -17, +615, +406 Soul Harvester Na: -29, +613, +316 or -11, +611, +267 Soul Harvester Zej: +140, +639, +400 Soul Harvester Gron: +110, +250

The shadowed men in the zone are the placeholders. Kill them to spawn the rares.

This will grant you access inside. Though you will still need to do another separate quest (Summoning the Creator, under related quests) to unlock the creator door.

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Other info is as follows:

FYI: "In order to enter the Obliesk for the first time, you must find and kill shadowed servitors and rift watchers in Ant, CL, EL, Zek, TS, or Nek. Doing so will spawn a cloud that you can enter by right clicking. Once inside there will be a skeleton on the ground with a scroll where you get the access quest from. Hope this clears some of the confusion about this."