TheWoWDBCompleting The Burning Heart is enough to get [item=151866] from skinning. I got it from the second mob.
The Burning Heart is a part of criteria 'Assault begins' of You Are Now Prepared!.
Quest
Tainted Scraps
Quest facts and objectives from the current retail game data.
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
You hand in this quest at [npc=125349], who is located on the bottom floor of the Vindicaar in Krokuun (78,6 - 38,7).
Still drops, but now says "You don't meet the requirements for that quest." when you r-click it in your bags.
Quest facts
LevelLevel 45
CategorySkinning
Quest ID48040
The client quest POI data records no map location for this quest, so no map is shown.
Check whether you have already completed this quest
in-game: /run print(C_QuestLog.IsQuestFlaggedCompleted(48040))
Description
<As you begin to carefully remove the skin from the corpse, you notice it quickly becoming corrupted by the decay of the creature.> <Pulling away, you were only able to extract a small amount of leather and something foul smelling. Perhaps someone on the Vindicaar might know more about this foul hide.>
Community notes from Wowhead · 6 comments
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Spell: Skinning Technique: Fiendish Leather (Rank 1)Teaches you how to gather fiendish leather more effectively.