When you go into the throne room of the palace, you will see the throne has an information point on it. Looking at this will give you the Codex entry: Caged in Stone.
You may have noticed that while walking within the Palace there are areas that will create a shifting gears sound. There are three of these pressure plates:
- Just outside the throne room. It is the large decorated square tile.
- Inside the throne room. Facing the throne, look to the left for an exposed column of lava. The tiles at the base look like an arrow pointing into the lava. The two pressure plates are the "tails" of the arrow.
When a character steps on a plate, it will make a loud clicking sound. Position one companion (or a pet/summon) on each plate (place party on hold), then with selected character click on the throne again. If you have done this correctly, there will be lightning and a dragon will appear, which you have to slay.
When you kill the dragon, it drops:Ageless
Silverite (Tier 6)
Requires: 34 strength
Critical chance: 2.25%
Armor penetration: 5.25
Strength modifier: 1.10
Weakens nearby darkspawn
Increases hostility and intimidation
+0.25 pc or +0.5 ps3xbox360stamina regeneration in combat
+4 damage vs. darkspawn (Silverite Greatsword) Heavy Chainmail
Varies (Tier 1-7)
Requires: 18 strength
Fatigue: 14.00% (Varies, not guaranteed)