Defeat Veritania, the Redeemer in a region with four Watchstones slotted
The Redeemer Walkthrough
(1) Find and defeat Veritania, the Redeemer
Open a map that’s in in one of the corner regions of the Atlas (Haewark Hamlet, Lex Ejoris, New Vastir, Lira Arthain).
The third time you do, Veritania will appear and taunt the player, adding her influence within the map region.
Repeat this two more times
Talk to Kirac. He will show the location of the Citadel in the region.
Talk to Zana to open six portals into Veritania’s Citadel.
After defeating the map boss, go into the portal and defeat Veritania, the Redeemer.
(2) Defeat Veritania, the Redeemer with four Watchstones slotted
To spawn the Conqueror again, open a map in a region with one Watchstone slotted with a map of the appropriate tier (as long as their corresponding Watchstone hasn’t been found yet for that region).
Find their Citadel again by running maps within the region they’re influencing two more times.
Repeat the process of entering their Citadel and defeating them.
Repeat this process with another Watchstone.
After the fifth time, the Conqueror will be defeated, completing the quest. They will not appear again until you have challenged Sirus.