Weaken the defense force in the Siel’s Western Fortress. Bring a group to kill fighters and archers, and collect Sentinel’s Marks.
Step 1. Get rid of the Siel’s Western Fortress GarrisonA force of Asmodians or Balaur that appears when Siel’s Western Fortress is Invulnerable. The Garrison is comprised of Fortress Snipers, Fortress Gallowglasses, Fortress Mages and Fortress Priests, and they each carry a Sentinel’s Mark., gather marks, and take them to DamathusAn adjutant of the Nezekan’s Shield Legion at the Forsaken Isle. He enjoys sunbathing.. (You need to collect: Sentinel’s Mark)