So, your Rexxar would have me fashion a poison for him? I'll give him what he desires, but there will be a price. Even for friends, there must be a price. Free things destroy friendships.
First, you must venture a short distance to the southwest to the Churning Gulch.
Therein mill some of the most poisonous creatures in all of Outland, or anywhere. I speak of the crust bursters, and this poison will require gathering their glands for me.
Details
The venom glands drop from both the Young Crust Bursters and the Greater Crust Bursters. The glands have a higher drop rate from the Greaters.
Use: Coats a weapon with poison that lasts for 30 minutes.
Each strike has a 20% chance of poisoning the enemy which instantly inflicts 44 to 56 Nature damage. 100 charges.