Items, NPCs, quests, objects and spells of patch 1.12.1, read live from the realm itself.

Speck of Dream Dust

NPC	Level	Zone	Chance
Wyrmkin Dreamwalker	42 - 43	Swamp of Sorrows	100%
Adolescent Whelp	34 - 35	Swamp of Sorrows	80.0%
Dreaming Whelp	35 - 36	Swamp of Sorrows	80.0%
Green Wyrmkin	41 - 42	Swamp of Sorrows	80.0%
Green Scalebane	42 - 43	Swamp of Sorrows	80.0%
Scalebane Captain	43 - 44	Swamp of Sorrows	80.0%
Elder Dragonkin	45	Swamp of Sorrows	80.0%
Lord Captain Wyrmak Rare Elite	45	Swamp of Sorrows	15.0%