Blade Grave Oldwalls - East is a location in Tyranny.
Points of interest
The entry hall is trapped (mind the openings on the walls). Dispose of the Scourge.
The lower left-hand exit to the Western part of the Oldwalls can be unlocked by entering the area from that side or by circling around. Use the glowing switch on the floor to open the door.
Use the switch on the floor to cross the chasm. With Lore 55, take rubbing of the rune on the wall to learn the Sigil of Directed Force. The locked chest has more healing items and some camping supplies.
The Malices and Wisps nearby can be lured over the trap (the openings in the floor) to take damage while you lure them in. Enter the room below to open the next part of the sector.
Fight off the malice and the horde of Wisps by using the doorway as a chokepoint. The hidden area in the triggered Bane catch to the side contains a Tidecaster's Opal. Use a torchkey on the beacon to activate the wall switch.