Mataus the Wrathcaster at Light's Hope Chapel in the Eastern Plaguelands will make a Plagueheart Circlet if you bring him the following: 1 Desecrated Circlet, 15 Wartorn Cloth Scraps, 3 Mooncloth and 3 Nexus Crystals.
I make no pretenses, maggot. The darkness Plagueheart items hold could very well destroy the both of us. That is why the price is so high. If I'm going to die, it's going to be as a rich man.
And I don't give an ounce of gnoll spit how you die, only that you do as I ask. Bring me what I require and we will both benefit - or die; but I've already explained this...
Exellent <name> !
, you got everything just as i asked and now i can make a Plagueheart Circlet.
The entirety of this quest happens at Eastern Plaguelands