This large circular chamber is accessed from and beyond the Frontier Caverns. The gate leading to the Proving Grounds chamber is locked until the quest Come to Court, after which the notice board quest Put the Eye Out becomes available.
A chest-containing antechamber is also locked behind a large gate until the quest A Challenge is accepted.
The chamber is always home to Goblins - they replenish their numbers by dropping down at the side of the large chamber. Initially a Cyclops is present, but after the quest A Challenge it is replaced by a Hydra.
From the entrance:
|On the far right side||Fluted Bow, Bespoke Longbow, Master's Merle, Gryphic Gauntlets, Assembled Sleeves, Runic Bangles, Assembled Breeches, Violet Neck Wrap|
|On the far left side||Scorched Pelta, Fine Magick Buckler, Caladbolg, Crescending Roar, Malignance, Fiery Talon, Divine Axis, Frozen Tomorrow|
|In the right side antechamber||Meloirean Cyclops Veil, Darkened Gloves, Dark Over-Knee Boots, Ring of Argent, Noble Earring, Harmonious Earring|
- The Hydra respawns after one week.