In the Shadow Isles: Library of Agony in Thresh’s Dungeon in the Ruined King, you’ll come across a room to the east of Suffering’s Reach that has 6 glyphs on the floor.
Activate the following glyphs in the following order:
- Mal
- Varo
- Egee
Next, interact with the pedestal and select “Flip to the tab Active Glyphs”. This will activate a summoning spell. Summon the otherworldly being to grant you a more powerful weapon/armor. You may use this service 3 times!