Go to North Freeport's Academy of Arcane Sciences, head to your left as you enter and you will see some elevators, one going up, another going down. Head downstairs, go across left bridge that heads slightly upwards and click that left-hand door leading you to Fulania T'Nal's room ( 22, -34, 147 ) within the Academy's Arcane Suites.
Once inside, find and hail Fulania T'Nal, finish dialog, allowing Leandre to kill Fulania
It's a clicky update in Chardok. You have to clear all the way down to The Chardok Palace and have green/blue/red portal access. Once you get down to the palace you will notice it looks just like Kor-Sha zone in. The hingestone is up the left staircase in a room with 3 ^^^ Sarnak. It's sitting on the bookcase at 899, -21, 264 .
Your Mythical Weapon has unique effects which will not work on level 81-90 spells, combat arts, or pets. By completing two quests, you may convert your Fabled or Mythical Epic Weapon into an Enervated Weapon and add persistent Mythical Effect spells to your knowledge book. This allows you to acquire other weapons without losing class-defining Mythical effects.
The quest requires that your class and your Epic weapon match. You will only receive the mythical spell gem of your current class.
You can start this series as long as you have the fabled version of your epic. But if you have completed "Epic Repercussions" then you will not be rewarded the mythical weapon if you go back and complete your class specific Kunark mythical quest.
The quests which make your Epic Weapon effect into a spell is the same for all classes.