AFAIK. Each mobs drop costume hat and 'first class soul' related to their class.(EX : Warlock Katrinn drops costume magic stone hat and both Warlock Katrinn and Sorceror Celia drop mage soul') Then you can make powerful hats by combine costume hat with 1 'first class' soul, related to their class, and 20 Enegy Debris. There are a chance of failure. But if you use 5 times quantity of materials, There are 100% success. ( I don't sure)
For slotted Cloak of the Fallen. It uses unslotted Cloak of the Fallen, 20 Ghost Chill and 100 Enegy Debris to create.
You can get Energy Debris by exchange several kind of weapon with NPC.
Edited by Sigma1, 17 May 2014 - 06:37 AM.