Prism of Light Guide

The Prism of Light is a dungeon on the northern side of the isle of Nujel'm. Adventurers enter it magically with the help of an NPC. (By buying a Ticket. It costs 10k and is valid for 7 days.)
While inside the dungeon the ticket can also teleport us back out.
The ticket lasts 7 game days.
There are small passages inside the dungeon. They teleport us to the next room.
Route through the dungeon:
A - Once inside, head a little further in and take the northern passage into the 2nd room.
B - In this room there is an energy in the middle of the crystal pool; follow the path towards it. (There is a yellow Crystal column here. The material needed for the first quest of Emilio the Tortured Artist in Britain comes from this stone.)
C - The Crystal Daemon area; this is where we get the first key. (The next room is just below, on the left.)
D - The second section, with Sea Serpents and Hydras. We get the 2nd and 3rd keys here. (For the next room, head to the far end of the river towards the left.) (Careful: Hydras and Serpents hit very hard, so watch yourself.)
E - This room holds Vortexes and Elementals. Our 4th key drops from the Vortexes. (The next room is again below, on the left.)
F - The room with the Crystal Lattice Seekers, i.e. the 5th key. (There are two different paths here. If we go down there are NPCs where we can res and buy some supplies.)
Up above, in the upper left, there are crystal clusters. There is a hidden passage here. Walk around it and you will find it. It leads to the mummies and to the Boss room.)
G - In this room the Unfrozen Mummies carry the 6th key. This is also the room we have to reach the Boss from and where we place the keys.

Materials and drops needed for the Peerless boss (we need 6 keys in total.)
1- Crystal Daemons - Schattered Crystals
2-Crystal Sea Serpents - Crushed Crystal Pieces
3-Crystal Hydras - Schatteted Crystal
4- Crystal Vortexs - Jagged Crystal Shard
5- Crystal Lattice Seekers - Pieces of Crystal

6- Unfrozen Mummys - Broken Crystal
Footnote: the Crystalline Fragments that spawn on the ground or drop from creatures are not for the Boss; they are one of the materials needed to cure Medusa's petrification.

Boss: The Shimmering Effusion
Slayer weapon: Fey
Tactics: this is one of the bosses that is hard to solo, so it is worth going with a party. The boss spawns creatures made of gas clouds that look much like itself. Clear those first, or you will die.

Drops : the artifact ring Crystalline Ring: http://www.uoguide.com/Crystalline_Ring
Captured Essence, a material used to create various items: http://www.uoguide.com/Captured_Essence

The quest item Lord Denthe's Journal: http://www.uoguide.com/Lord_Denthe%27s_Journal