Command of the Draconic language is required to start or complete this quest.
This is the first in a series of quests from Lord Nagafen in Solusek's Eye. Completing this quest opens up the Deception quest. This quest used to require access quests, but no more. One of the drakota is in Trembling Lagoon, another is in Cove of Decay, and the final one is in Miragul's Menagerie.
Note: During Nagafen's introduction dialogue, do NOT choose the option "The Drakota are yours and I want some answers!" or Nagafen will instantly slay you.
First slay the Ar'ticae cultist (51 epic x2) in the eastern room
Next kill the Ar'ticae scryer (51 epic x2) in the western room
Then kill Raegh the Protector (51 epic x4) blocking the door in the northern hallway.
Enter the door and Ar'ticae (52 epic x4) will be in the middle of the room. You must kill a Ar'ticae summoner (51 epic x2) in the back of this room to make her killable.
Mjolni (52 epic x4) is at the edge of the water, simply kill him and loot the Essence Shard of Soul from his corpse. He stifles a lot and around 25% health he summoned several epic x2 disciples to assist him.
Once the essences are collected head to the Crypt of Vox in Permafrost. To trigger a hailable Vox, right-click on the essences to release her spirit. There will be a surprise to this event, not gonna spoil it for ya.
Enter the Essences in the order Soul - Heart - Mind.
Once the ritual is complete, a Hailable Lady Vox will spawn. Speak to her to continue the quest.
Next step is to defeat King Drayek in his chamber. You will then discover that the Sage of the Ages is a named dragon, Darathar, who is after the Prismatic eggs. Return to Lord Nagafen and this will then open up the Deception quest (see related quests).