Where to Farm Dust of Decay

The best place to farm Dust of Decay is Alterac Mountains, where Jailor Borhuin (level 37) drops it at 0.3%. That is the vanilla 1.12 chance, not yet confirmed in Forever. 35 sources are ranked below by drop chance.

Best zones:

The 15 zones with the best source; every source is listed below.

Zone	Sources	Best source	Level	Drop%
Silithus	4	Apothecary Quinard	55	23.2%
Alterac Mountains	1	Jailor Borhuin	37	0.3%
Arathi Highlands	3	Singer	34	0.1%
Stranglethorn Vale	6	Murkgill Warrior	35-36	0.0%
Blackrock Spire	1	Spirestone Reaver	55-56+	0.0%
Desolace	4	Gelkis Scout	32-33	0.0%
Feralas	3	Woodpaw Mystic	42-43	0.0%
The Barrens	1	Razorfen Battleguard	33-34+	0.0%
Loch Modan	2	Shadowforge Surveyor	35-36+	0.0%
Scarlet Monastery	2	Scarlet Myrmidon	37-38+	0.0%
Felwood	1	Jadefire Betrayer	52-53	0.0%
Zul'Farrak	1	Sandfury Shadowcaster	43-44+	0.0%
Badlands	1	Shadowforge Warrior	38-39	0.0%
Deadwind Pass	2	Restless Shade	58-60	0.0%
Scholomance	1	Splintered Skeleton	59-60+	0.0%

All sources, by drop chance:

Vanilla reference — from the 1.12 world data, not yet confirmed in Forever.

Source	Level	Zone	Spawns	Side	How	Drop%	Map
Apothecary Quinard	55	Silithus	1	Alliance only	Drop	23.2%	map
General Kirika	60	Silithus	1	Alliance only	Drop	23.2%	map
Marshal Bluewall	60	Silithus	1	Horde only	Drop	23.2%	map
Jailor Borhuin	37	Alterac Mountains	3		Drop	0.3%	map
Twilight Keeper Mayna	60	Silithus	1		Drop	0.2%	map
Singer(rare)	34	Arathi Highlands	1		Drop	0.1%	map
Murkgill Warrior	35-36	Stranglethorn Vale	23		Drop	0.0%	map
Spirestone Reaver(elite)	55-56+	Blackrock Spire	3		Drop	0.0%	map
Apothecary Jorell	36	Arathi Highlands	1	Alliance only	Drop	0.0%	map
Gelkis Scout	32-33	Desolace	17		Drop	0.0%	map
Bloodscalp Beastmaster	34-35	Stranglethorn Vale	6		Drop	0.0%	map
Woodpaw Mystic	42-43	Feralas	92		Drop	0.0%	map
Woodpaw Mongrel	40-41	Feralas	75		Drop	0.0%	map
Hatecrest Warrior	42-43	Feralas	52		Drop	0.0%	map
Razorfen Battleguard(elite)	33-34+	The Barrens	49		Drop	0.0%	map
Shadowforge Surveyor(elite)	35-36+	Loch Modan	39		Drop	0.0%	map
Stonevault Rockchewer(elite)	36-37+	Loch Modan	32		Drop	0.0%	map
Scarlet Myrmidon(elite)	37-38+	Scarlet Monastery	27		Drop	0.0%	map
Jadefire Betrayer	52-53	Felwood	26		Drop	0.0%	map
Sandfury Shadowcaster(elite)	43-44+	Zul'Farrak	25		Drop	0.0%	map
Shadowforge Warrior	38-39	Badlands	23		Drop	0.0%	map
Restless Shade	58-60	Deadwind Pass	13		Drop	0.0%	map
Deadwind Brute	55-56	Deadwind Pass	9		Drop	0.0%	map
Scarlet Champion(elite)	39-40+	Scarlet Monastery	9		Drop	0.0%	map
Mage Hunter	38-39	Desolace	8		Drop	0.0%	map
Slitherblade Tidehunter	36-37	Desolace	6		Drop	0.0%	map
Splintered Skeleton(elite)	59-60+	Scholomance	5		Drop	0.0%	map
Bloodsail Sea Dog	44-45	Stranglethorn Vale	41		Drop	0.0%	map
Burning Blade Adept	31-32	Desolace	18		Drop	0.0%	map
Fireguard(elite)	50-52+	Blackrock Depths	11		Drop	0.0%	map
Kurzen Headshrinker	34-35	Stranglethorn Vale	8		Drop	0.0%	map
Bloodscalp Hunter	34-35	Stranglethorn Vale	76		Drop	0.0%	map
Bloodscalp Scout	34-35	Stranglethorn Vale	76		Drop	0.0%	map
Drywhisker Surveyor	37-38	Arathi Highlands	8		Drop	0.0%	map
Undead Ravager	37-38	Shen'dralas	26		Drop	0.0%	map

Needed for:

Recipes:

Recipe	Profession	Needs
Instant Poison	Poisons	1x
Instant Poison II	Poisons	3x
Mind-numbing Poison	Poisons	1x
Mind-numbing Poison II	Poisons	4x

Drop% is the rate recorded in Forever once a source has been looted ten times; a greyed figure is the vanilla 1.12 chance from the world data (vanilla reference — from the 1.12 world data, not yet confirmed in forever). Spawns counts the source's spawn points in the world data. "Side" names which side can kill the NPC when the other finds it friendly. The lead picks the best chance among sources that are not a rare spawn and have at least three spawn points.