Below the surface that we call home, there lies another world. A world that is dark, cold, and filled with tunnels, caverns, and secrets long held to the darkness. If one were to think that such a place is without life, then they would be in for a great shock! The Underdark is filled with a vast array of creatures and races, all with their own motives and histories. Perhaps one of the most powerful and dangerous of the races in this dark world is a race of elves called the Drow.
 
They are elves that fell to the corruption of a dark goddess and had all that was good in them, twisted into evil.  One of the greatest things that they have created is a substance that can neutralize their enemies quickly. This substance is rarely seen on the surface, as it is easily destroyed by sunlight. If it were not the fortunate luck of saving a merchant of such wares, from a rather very angry beholder I might not have been able to see it myself.
 
Extremely grateful, for his life, we were able to develop a mutually beneficial arrangement in trade for both of us. And this arrangement allows me to bring this rare substance to those seeking to study it. Corked and sealed in a vial, to preserve its potency. Sufficient for all magical potions, magical studies, and spell components.