I used some of that dust to calibrate the detector to hone in on the energy signatures of the Dragonoid Heart Crystals. It's so powerful, it can track them even if they've been recently moved! I've locked in on one in the Barrens so hurry up and get to it before the 'Oids do!
No crystal? Not even dust? Hmmm...that's a thinker. It's like somebody warped it to a location out of the detector's range as soon as we got wise to it! Who could move that fast?