Bloodthirsty is a trait added in Update 18 which can only be found on jewelry. Jewelry with this trait does not drop normally, but may be obtained by completing weekly Trials quests, or by acquiring them from another player. Once learned, items with this trait may be crafted using 
Slaughterstone, which is also obtained from Trials. Items with the Bloodthirsty trait will increase your weapon and spell damage against enemies below 90% Health by an amount dependent on the quality of the item.
| Increase Damage | ||||
|---|---|---|---|---|
| Normal | Fine | Superior | Epic | Legendary |
| 210 | 245 | 280 | 315 | 350 |