To gain access to Ghaldrid's Summoning Chamber, you must collect:
(A group only needs one set, but the same player should collect all three items.)
In the main room of the Oculus of Kaon, the player with the set of keys should right-click the large blue crystal. This will open a large orange portal above the crystal. Each group member should right-click the portal, in turn, to enter Ghaldrid's Summoming Chamber. Note: At this time, there is a graphics bug where the portal seems to disappear after the first player goes through. However, the portal remains accessible for the other group members.
Note: Recommend not adding or changing group members at this stage. The portal is only available to your group, and can be disabled if your group composition changes. The crystal has a long reset time (at least 1 hr) before it can be clicked again for a new portal.
Ghaldrid awaits, non-KOS. A brief dialog with Ghaldrid triggers the event.
First, Ghaldrid spawns Steng, a level 32 4-dot drake. He is the toughest part of the event. He hits like a truck, and stuns frequently. Recommend avoid AoE spells, as Ghaldrid will join the fight if it.
Second, Ghaldrid becomes attackable. After a brief skirmish, he will become invulnerable, teleport himself to the first raised platform, and spawn a few 2-dot sprites. Kill the sprites to advance the event. Note: this stage is slightly buggy. Give it 30 seconds to 2 minutes to advance itself. Sometimes the event does not advance automatically. The ramp up to Ghaldrid is guarded by Kaon Blocker, an unattackable sprite with a mean knockback. If the Kaon Blocker does not de-spawn after you kill the KOS sprites, use levitation to force your way past. Once on the first platform, the event will continue.
Mobs will spawn on each of the series of platforms. In the past, all the mobs could be cleared first, and then Ghaldrid could be tackled. I am told, but have not confirmed, that the event has been updated so that it will fail if you try to engage mobs on any platform higher than where Ghaldrid stands at any given time. This is a minor inconvenience.
Third, clear the first platform of mobs. They are 3-dot brownies and should be a cinch. Sometimes a named brownie, Wrecker, spawns. After the platform is clear, engage Ghaldrid. Part-way through, he will invuln and teleport to the next platform. Note: If your group is overpowered or very high DPS, be sure to burn Ghaldrid slowly and go easy on the DoTs. If you accidentally kill him here, the event ends with no reward.
Fourth, rinse and repeat. Clear the next platform (3- and 4-dot fairies). Engage Ghaldrid. He will teleport again.
Finally, advance to the top platform. Protip: cancel lev to get up the narrow ramp. Ghaldrid's name will now be all CAPS, indicating that he gives city faction platinum coins. He appears between two adds, level 32 4-dots. Use any combination of crowd-control and brute force to kill all three mobs.
Congratulations! Enjoy his modest loot, and completion of your quest (NEED MORE INFO), if you were on it.
Icing on the cake: Once you kill GHALDRID, the npc TITANIA will spawn on the top platform. She offers a trade to players holding full sets of keys: hand in the keys for a reward. The reward is a random one of four possible heroic items. The item you receive will be soulbound, and not necessarily usable by your class. See her page for item details. Protip: farm multiple sets of keys, as they can be handed in repeatedly once Tatiana is spawned. This increases your chances of getting an item usable by your class. HintHint, the keys are tradeable.
