The Drowning Labyrinth
Return to Rhulk's vault and discover what is beyond its door.
Complete the "Sundered Doctrine" dungeon.
With the Pyramid responsive to your increasing knowledge, it may be possible to open the door in the depths of Rhulk's vaults.
"I'm spinning conjecture so fast my Ghost keeps threatening to tranq me. Yeah, Cowlick, I'm telling on you. To Ikora's Guardian!" —Hidden Agent TRU-135