Where to Farm Thorium Lockbox

The best place to farm Thorium Lockbox is Eastern Plaguelands, where Plague Monstrosity (level 57-58) drops it at 0.5%. That is the vanilla 1.12 chance, not yet confirmed in Forever. 456 sources are ranked below by drop chance.

Gold per kill: Plague Monstrosity is worth about 11s 56c a kill in item drops (at Auction House prices). Gold farming spots, level 50-60

Best zones:

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

Zone	Sources	Best source	Level	Drop% ▼
Ashenvale	1	Emeraldon Tree Warder	60+	5.5%
Western Plaguelands	32	Scarlet Executioner	60+	4.2%
Unknown zone	48	Seasoned Reaver	59+	3.7%
Eastern Plaguelands	51	Blighthound	58-59+	2.9%
Silithus	43	Hive'Zora Tunneler	58-59+	1.8%
Burning Steppes	17	Malfunctioning Reaver	56	1.7%
Hillsbrad Foothills	3	Writhing Mage	58-59+	1.5%
Blasted Lands	10	Manahound	60+	1.5%
The Hinterlands	1	Verdantine Tree Warder	60+	1.4%
Felwood	8	Lord Banehollow	59+	1.4%
Dire Maul	38	Eldreth Phantasm	58-59+	1.3%
Blackrock Spire	41	Blackhand Thug	60+	1.1%
Zul'Gurub	19	Zulian Cub	60	1.1%
Blackrock Depths	8	Shill Dinger	56+	1.1%
Winterspring	47	Hederine Manastalker	59-60+	1.0%

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All sources, by drop chance:

Classic data: from the patch 1.12 world data, not yet confirmed in Forever.

Source	Level	Zone	Spawns	Side	How	Drop% ▼	Map
Unliving Caretaker	59-60	Deadwind Pass	10		Drop	0.2%	map
Thauris Balgarr(rare)	57	Burning Steppes	1		Drop	0.2%	map
Firetail Scorpid	56-57	Burning Steppes	12		Drop	0.2%	map
Warpwood Tangler(elite)	55-56+	Dire Maul	3		Drop	0.2%	map
Vile Tutor	56-57	Eastern Plaguelands	16		Drop	0.2%	map
Crusader Lord Valdelmar(elite)	60+	Eastern Plaguelands	1		Drop	0.2%	map
Hive'Ashi Drone	57-58		0		Drop	0.2%	map
Scarlet Archmage(elite)	55-57+	Eastern Plaguelands	11		Drop	0.2%	map
Duskwing(elite)	60+	Eastern Plaguelands	1		Drop	0.2%	map
Crypt Horror	57-58	Eastern Plaguelands	13		Drop	0.2%	map
Gruklash(rare)	59	Burning Steppes	1		Drop	0.2%	map
Thuzadin Necromancer(elite)	60-61+	Stratholme	17		Drop	0.2%	map
Spirestone Mystic(elite)	55-56+	Blackrock Spire	3		Drop	0.2%	map
Spectral Teacher(elite)	58-61+	Scholomance	3		Drop	0.2%	map
Hive'Zora Wasp	58-59	Silithus	107		Drop	0.2%	map
Frostsaber Huntress	58-59	Winterspring	29		Drop	0.2%	map
Frostsaber Stalker	59-60	Winterspring	47		Drop	0.2%	map
Firebrand Dreadweaver(elite)	57-58+	Blackrock Spire	5		Drop	0.2%	map
Cobalt Wyrmkin(elite)	55-56+	Winterspring	36		Drop	0.2%	map
Warpwood Crusher(elite)	56+	Dire Maul	13		Drop	0.2%	map
Ranger	59-60	Eastern Plaguelands	13	Horde only	Drop	0.2%	map
Smolderthorn Axe Thrower(elite)	55-56+	Blackrock Spire	9		Drop	0.2%	map
Strashaz Siren(elite)	59-60+	Dustwallow Marsh	6		Drop	0.2%	map
Molten War Golem(elite)	55-56+	Blackrock Depths	6		Drop	0.2%	map
Shade of Ambermoon	58	Silithus	2		Drop	0.2%	map
Damned Soul	59-60	Deadwind Pass	12		Drop	0.2%	map
Gruff(rare)	57+	Un'Goro Crater	1		Drop	0.2%	map
Carrion Devourer	56-57	Eastern Plaguelands	44		Drop	0.2%	map
Crimson Templar(elite)	60+		0		Drop	0.2%	map
Chillwind Ravager	57-59	Winterspring	39		Drop	0.2%	map
Blazerunner(elite)	56+	Un'Goro Crater	1		Drop	0.2%	map
Death Lash(elite)	57-58+	Dire Maul	12		Drop	0.2%	map
Sky Shadow	55-56	Deadwind Pass	13		Drop	0.2%	map
Wildspawn Trickster(elite)	56-57+	Dire Maul	4		Drop	0.2%	map
Hoary Templar(elite)	60+		0		Drop	0.2%	map
Smolderthorn Shadow Priest(elite)	55-56+	Blackrock Spire	17		Drop	0.2%	map
Quel'Lithien Protector	60	Eastern Plaguelands	2	Horde only	Drop	0.2%	map
Strashaz Warrior(elite)	59-60+	Dustwallow Marsh	5		Drop	0.2%	map
Fireguard Destroyer(elite)	54-56+	Blackrock Depths	45		Drop	0.2%	map
Mangled Cadaver(elite)	55-56+	Stratholme	42		Drop	0.2%	map
Restless Shade	58-60	Deadwind Pass	13		Drop	0.2%	map
Frostsaber Pride Watcher	59-60	Winterspring	5		Drop	0.2%	map
Servant of Sevine	55-56	Blasted Lands	3		Drop	0.2%	map
Anvilrage Captain(elite)	55-56+	Blackrock Depths	2		Drop	0.2%	map
Shadow Lord Fel'dan	57	Felwood	1		Drop	0.2%	map
Lar'korwi	56		0		Drop	0.2%	map
Dark Summoner	55-56	Eastern Plaguelands	4		Drop	0.2%	map
Flesh Golem(elite)	56-57+	Western Plaguelands	2		Drop	0.2%	map
Scarlet Paladin(elite)	55-56+	Western Plaguelands	37		Drop	0.2%	map
Mossflayer Shadowhunter	58-59	Eastern Plaguelands	25		Drop	0.2%	map
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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 (classic data: from the patch 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.