Orvo

Orvo is a greenish liquid that is generated as runoff during the creation of living constructs. It nullifies magic around or inside of it. 
A lake with a massive quantity or Orvo underneath a dozen feet of water is an hour or so north of Manus. A devil known as Torold resided there until the Heroes of the Library and Baphedul slayed him and his horse Plaguebearer. The party found an ornate vial of the green liquid inside the skull of Plaguebearer.
The run off of processes used to create undaunted and other nonliving constructs, it is a substance that is formed from the fusion of anima and umor to create vitae. It smells like ozone and neutralizes substances in its presence, which is seen as a sign that you're entering into contact with the toxic stuff.
=== Orvo ===
Ingredient, very rare
This substance creates a field that blocks magic, the effects are identical to the spell antimagic field. Constructs, including living constructs, become unconscious if within the area of effect of the Orvo. Long periods of exposure to the substance cause lasting physical and mental damage. Each sixday spent in contact with or in the presence of orvo, a creature must make a Constitution saving throw DC 18. On a failure, the creature reduces each of its ability scores permanently by 1. Additionally, any residuum that enters within 5 feet of orvo and remains there for over 1 minute becomes inert and is transformed into beach sand.
== Recipes ==