The best place to farm Thorium Ore is Eastern Plaguelands, where Living Decay (level 55-56) drops it at 1.5%. That is the vanilla 1.12 chance, not yet confirmed in Forever. 385 sources are ranked below by drop chance.
Best zones:
| Zone | Sources | Best source | Level | Drop% |
|---|---|---|---|---|
| Silithus | 34 | Small Thorium Vein | 100.0% | |
| Winterspring | 45 | Rich Thorium Vein | 100.0% | |
| Felwood | 37 | Small Thorium Vein | 100.0% | |
| Swamp of Sorrows | 4 | Small Thorium Vein | 100.0% | |
| Zul'Gurub | 19 | Hakkari Thorium Vein | 100.0% | |
| Un'Goro Crater | 38 | Ooze Covered Thorium Vein | 100.0% | |
| Blasted Lands | 28 | Kirith the Damned | 55+ | 2.5% |
| Eastern Plaguelands | 48 | Living Decay | 55-56 | 1.5% |
| Western Plaguelands | 24 | Foreman Jerris | 62+ | 1.5% |
| Burning Steppes | 31 | Firetail Scorpid | 56-57 | 0.7% |
| Feralas | 7 | Zukk'ash Tunneler | 45-46 | 0.3% |
| Searing Gorge | 16 | Muck Splash | 47-49 | 0.3% |
| Tanaris | 12 | Hazzali Tunneler | 48-49 | 0.2% |
| Azshara | 29 | Timbermaw Den Watcher | 49-50 | 0.2% |
| The Hinterlands | 7 | Vilebranch Aman'zasi Guard | 50-51+ | 0.1% |

- Ooze Covered Rich Thorium Vein 39.8, 13.3
- Mistress Natalia Mar'alith 52.0, 100.0
- Hive'Regal Hive Lord 57.1, 100.0
- Rex Ashil 45.7, 28.9
- Hive'Ashi Defender 38.5, 12.8
- Hive'Zora Hive Sister 20.5, 64.8
- Hive'Zora Tunneler 19.1, 66.8
- Hive'Regal Ambusher 53.2, 99.5
All sources, by drop chance:
Needed for:
Recipes:
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.