Council Chamber

Council Chamber is a Fae Stronghold and the site of the heinous crime that set in motion the crisis on Losomn. This is the seat of Fae government, where the One True King ruled from his throne, advised by the Fae Council. One of the council members is a traitor, though, and has assisted the Imposter by putting the One True King into a magical, eternal sleep. Ironically, though outsiders like you are universally hated in Losomn, only an outsider can solve this mystery: who murdered the One True King?

Council Chamber

Objective
Discover the identity of the One True King's assassin.	Reward
Assassin Dagger and Fae Protector Signet OR...
Ornate Blade

Speak to the Council

Your first stop is the Council Chamber itself. Walk up either of the two stairways opposite the dungeon entrance and see a raised walkway that leads to the foot of three, tall pedestals. Upon each pedestal sits a member of the Fae Council: ↓

The Council

Walk down the catwalk to stand before the council members and speak to them. They charge you with exposing the traitor but warn that, should you make an accusation, you'd better be right.

When you're finished speaking with the council members, exit the chamber and proceed through the doorway to the right.

Find the Mirror Work your way through the dungeon. Its layout is essentially a large square, so just keep heading for unexplored territory. If you find yourself in need of extra healing, keep an eye out for shrines like this: ↓

Shrine

Their healing waters bestow a Fae Cleanse, which clears all Status Effects and Blights and increases Health Regen by 0.85 HP per second.

At the end of the dungeon is a library. As you proceed up the stairs to a raised catwalk, you'll see a storage room with an intriguing mirror: ↓

The black mirror

Walk into the storage room and unlock the door to your left—that's your quick way back to the World Stone just outside the Council Chamber. Before you leave the storage room, interact with the mysterious mirror, which will transport you into a dreamlike, alternate reality called the Council Tribunal.

Council Tribunal The Council Tribunal is the same map but, as you're about to see, things appear differently in this strange realm. You'll probably be attacked by a pair of armored spearmen, so make sure you're safe before you look around. There is now a World Shard in front of the mirror. Use that if you like, then leave through the door you just unlocked.

Follow the passage down to where the World Stone used to be and head up the sweeping stairway and back into the Council Chamber. The council members are gone, but the room is far from empty. Clear the enemies from the chamber, then walk across the glass floor to the bases of the three pillars where the council members were seated.

At the base of each pillar is a rectangular, colored key bearing the mark of one of the council members. Notice that the keys and their reflections in the glass floor are different: ↓

Now that you're in this alternate reality, you can take the keys from the bases of the pillars. Take all three, then replace them so that each key matches its reflection in the floor: ↓

Keys match their reflections

When you place all three keys correctly, the great doorway leading to the One True King's chamber unlocks and opens. Walk up the stairs to either side of the chamber and enter the king's chamber. Approach the horrific, sleeping king and climb up the platforms to the left of his throne: ↓

The One True King sleeps

From the second platform next to the throne, leap across to the ledge behind the throne and pick up the Assassin's Seal. Now, stand on the leaves directly behind the throne and leap across to the back of the throne. Buried in the back of the king's neck is the Assassin Dagger quest item: ↓

The Assassin Dagger

You have your evidence, so it's time to return to speak to the council. As you leave the throne room, you'll be attacked by a band of Fae Spearmen and Fae Archers, so be ready.

When the fight's over, exit the king's chamber and head back through the council chamber and retrace your route back to the black mirror. Interact with the mirror to return to the Council Chamber map.

Choice of Resolutions Return to the World Stone and head back up the stairs and into the council chamber. Again, the members are seated on their pillars. It's time to approach them with the evidence you found.

There are two ways you can resolve the mystery, and your reward(s) depend on which you choose:

Accuse the correct council member and surrender the Assassin Dagger as evidence to receive the Ornate Blade melee weapon. Accuse any council member but refuse to give the Assassin Dagger, then defeat the council members to receive the Fae Protector Signet ring and keep the Assassin Dagger quest item. If you choose to make the correct accusation, you'll first need to open your inventory and inspect the Assassin Dagger. Rotate it so you can see the pommel. Inlaid into the pommel is the sigil of the council member who owns it: ↓

Assassin Dagger pommel

When you make your accusation, make sure you choose the council member whose sigil matches the one you see on the Assassin Dagger.

Note that if you keep the Assassin Dagger, you can take it to Nimue to have her craft the Assassin's Dagger melee weapon.

To get all of the rewards, you'll have to play through the Council Chamber twice.