Board Thread:Questions and Answers/@comment-16144416-20131030160403/@comment-8975815-20131031005321

There is a way to get Nether Dust without crafting it, but it's pretty rare... You get them from trading super rare dragons, the mystery box sometimes comes back and gives a Nether Dust or Spell Scroll... Rare though.

Also when sending dragons on quest to get items to craft dragons can sometimes bring back Nether Dust, but again it's rare.