Gem · Legendary Gem
Gem of Efficacious Toxin
Gem of Efficacious Toxin is a legendary gem in Diablo III. Poison all enemies hit for 2,000% weapon damage over 10 seconds.
Effect at rank …
Poison all enemies hit for 3,250% weapon damage over 10 seconds.
From rank 25: All enemies you poison take 10% increased damage from all sources and deal 10% less damage.
Effect per rank
A freshly found gem is rank 0; you upgrade it with Urshi after Greater Rifts.
| Rank | Effect |
|---|---|
| 0 | Poison all enemies hit for 2,000% weapon damage over 10 seconds. |
| 1 | Poison all enemies hit for 2,050% weapon damage over 10 seconds. |
| 10 | Poison all enemies hit for 2,500% weapon damage over 10 seconds. |
| 25 | Poison all enemies hit for 3,250% weapon damage over 10 seconds. |
| 50 | Poison all enemies hit for 4,500% weapon damage over 10 seconds. |
| 75 | Poison all enemies hit for 5,750% weapon damage over 10 seconds. |
| 100 | Poison all enemies hit for 7,000% weapon damage over 10 seconds. |
| 125 | Poison all enemies hit for 8,250% weapon damage over 10 seconds. |
| 150 | Poison all enemies hit for 9,500% weapon damage over 10 seconds. |
From rank 25
All enemies you poison take 10% increased damage from all sources and deal 10% less damage.
Upgrading with Urshi
How many attempts and Greater Rifts you need to reach a given rank is shown by the Urshi calculator.
Questions & answers
Up to which rank can "Gem of Efficacious Toxin" be upgraded?
Max rank: no fixed cap. You upgrade it with Urshi after Greater Rifts.
What does "Gem of Efficacious Toxin" do from rank 25?
Base effect: Poison all enemies hit for 2,000% weapon damage over 10 seconds. From rank 25: All enemies you poison take 10% increased damage from all sources and deal 10% less damage.
