From Guild Wars Wiki
A Torc'qua Chest will spawn in the Domain of Anguish near Lord Jadoth's spawn point after his death and that of all Margonites in the area. Each player in the party can open the chest once and will receive Margonite Gemstones.
- 1 to 4 Margonite Gemstones (depending on how many Lords of Anguish were defeated before Lord Jadoth; twice as many in Hard mode).
- A Spirit of Truth will spawn near the Chest.
- To get the Torc'qua Chest, all Margonites must be killed. You may find that a couple hide beyond the hill towards The Stygian Veil. Approaching this area will cause them to come toward you.