You can get this legendary throwpotion only as a reward for the Dark Rituals quest and only if you have Community Patch installed.
Notes
- This throwpotion drops in several varieties, that have different appearances and damage types. The yellow bonus is also random. So don't be surprised if the potion you'd get would differ from the one pictured here.
- Throwpotions as a ranged weapon class were added with Community Patch.
- This item was named 'Essence of Dark Matters' as a thank you for the DarkMatters Community.
- The Dark Rituals quest that is rewarded with this item is one of the new quests added with the Community Patch.