Archmage Angela Dosantos at Light's Hope Chapel in the Eastern Plaguelands will make Frostfire Gloves if you bring her the following: 1 Desecrated Gloves, 8 Wartorn Cloth Scraps and 4 Mooncloth.
As a Watcher, I was allowed access to many of Medivh's personal effects. Among those items, I found the tomes most enlightening. While the majority of the books were filled with - to put it bluntly - tripe, there were some gems. One of those tomes documented the creation of a set of armor fit for an archmage: Frostfire. <Angela points to her head.> It's all in here and I am willing to share the fruits of that knowledge with you as long as you are able to provide me with the necessary materials.
With the proper materials and reagents, I am able to reform the mythical Frostfire armor.
Do not forget that power left unchecked is as destructive as power left unused, hero. Use discretion when donning Frostfire.
!?