Reputation Manager Rapidus:
Tell me what you want, and if you are worthy I will help you.
If you have already bestowed them with a special ability, top-grade weapons and armor can be enhanced beyond A-Grade especially for PvP combat. Once a multi-user item is specialized, you will still be able to enchant the item. However, you cannot augment, crystallize, convert or add an attribute to it. Think carefully before making a decision...

Enhance weapons and armor for PvP.
Cancel enhancement.
Obtain consumable item.