User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-2248808-20110720033122/@comment-125.165.93.249-20121029060202

Canonically, the 'unknown substance' was Dragonstone dust. It was a natural ferrous-magnetical element that gives Elder Dragons all of their mythical power by altering magnetism...and if you say only magnetism is not enough explanation for Dragon Element, google what it could do to many things.