In the latest PTR 10.1 build, the four Infusions of Power recipes for Enchanting have been modified slightly. Enchanters and/or buyers will now need to rely on Alchemists for Dracothyst for some of these Infusions.
Enchanted Crest Recipe Changes Enchanted Aspect's Shadowflame Crest and Enchanted Wyrm's Shadowflame Crest are the two new Enchanted Crests in Patch 10.1 that can be applied to Epic Quality gear.
In the previous release, these recipes only required the BoP looted Crest(s) and a handful of enchanting materials, but a Enchanted Aspect's Shadowflame Crest now requires x2 Dracothyst while a Enchanted Wyrm's Shadowflame Crest requires x1 Dracothyst.
Both of these recipes still need enchanting materials, but most materials have been cut in half. The two Rare Quality infusions, Enchanted Whelpling's Shadowflame Crest and Titan Training Matrix V, do not require this BoP gem.Read more on wowhead.com