Speck of Dream Dust

Speck of Dream Dust drops from the following green dragons in the Swamp of Sorrows:
 * Dreaming Whelp
 * Adolescent Whelp
 * Lord Captain Wyrmak
 * Green Wyrmkin
 * Scalebane Captain
 * Green Scalebane
 * Elder Dragonkin

As a quest objective

 * Dream Dust in the Swamp