Find the Scribe - end | Stains of Heresy Darksiders 2 Guide
Last update: 11 May 2016
After you are back in the main chamber of the citadel, you should notice that black goo is not there anymore. This means that you can now proceed through the door to the north that has been inaccessible so far (the above screenshot). Inside the room behind the door you should search for a Relic of Etu-Goth (side quest [Lost Relics]).
There is the last part of the quest ahead of you. It consists of a series of puzzles that you can solve using Voidwalker. The first of the portals to activate is dead ahead of you(screenshot 1), with the other one an the balcony above (screenshot 2). The latter one needs to be reinforced. After you activate both portals, you need to go through the first one and wait for the other one to catapult you to the balcony above.
Find now the portal shown in the screenshot above, which is located in a different room. As a portal to pair it up with chose the one below and enter it. Thanks to this, you will get to an area with a chest. Afterwards, jump down to the balcony you earlier landed on.
Turn now towards the highest-located portal shown in the above screenshot and make sure that you reinforce it while activating it. Choose the bottom portal to pair it up with, and go through. Thanks to it, you will be catapulted to a new rocky ledge (screenshot2).
Wall run along the wall on your right, which will give you access to the door that you can see in the distance. Climb up the stairs now and, after you reach the last room in the citadel, you will enter a fight with the boss of this location.