Are specific Legendary Crafting Materials restricted to only the super-unique bosses that are described in the material list, or can these same materials also drop from places like...rifts, and other areas.
A good example. If I am looking to farm "Demon Skin" materials... the site says they only drop from 4 specific Super-Unique bosses. Is it possible to farm them inside Rifts instead, or do they have no drop chance out side of those super-unique bosses.