Amulet of the Planes
DISCLAIMER: Your Steps and Tasks may be different
Your steps and tasks MAY vary. Below is one example.
After directed by a Crier to see Mairi Ralilden at the Lethanis Association, I rode my horse southward to see what she needed. She promised me a very powerful amulet, so I heeded her instructions, and headed off to find the Tomb Raider Lonry Aetheoc (Ring South of the Northwest Guard Tower in Salsbury Plains). His death bestows the Jet Black Chain.
Return to Mairi, but don't give the chain. She'll send you to Caer Ulfwych to see Fianya Walelden. Fianya wants an Opaque Glass Disc from Ciraron Webweaver. This is the Patience part. Webweaver can be found with Arachnaedia and the bloated spiders, she's on a very slow spawn. (I noticed that after killing bloated spiders whilst Arachnaedia was there, Webweaver finally spawned). Be careful - even if you spot her, she's seems to blend into the woods and is hard to find again - so once you have her targeted, don't click on anything else. Loc 50k, 28.5k.(Note: some have been sent to get opaque glass disk from a cliff spider in Cornwall for this step.)
Return with the disc to Fianya, she'll take the disc and then the chain and fashion an amulet for you. Return to Mairi. Mairi will take the amulet and send you out to obtain the spell scroll from Borwyr the Cursed. He can be found in Camelot Hills, northeast of the bridge where the Grumoz demons lair. Loc 49678, 52870. When he dies, you'll obtain the spell scroll. Take this back to Mairi and she'll make you pledge to her that you don't end up like Borwyr. After that, she gives you the Amulet of the Planes.
When I did the quest step 2 was completely different, instead of being told to to get the opaque glass disc from a webweaver, I was send to the Avalon Marsh to get it from a mud golem. I found one at 16k, 49k near the lake.
When returning to Fianya I received 81.920 xp (at lvl 18).
Step 3 - I got the Spellscroll of Borwyr the Cursed, he spawns in western Avalon Marsh . When returning to Mairi I again receive 81.920 xp and the necklace which is blue for lvl 18.