Motes of Shadow are dropped by void beings in Outland. As of Patch 2.1 the following has changed regarding Mote of Shadow drops: - Enraged Fel Sparks now properly drop Motes of Fire instead of Motes of Shadow. - Motes of Shadow now primarily drop from void creatures and have been removed from nearly all demons. Engineers can gather Motes of Shadow with the from the Felmist clouds found in Shadowmoon Valley.