Oil
Resistance to acid damage for 1 hour when applied to skin or armor. One use. Thick viscous oil with sharp acrid smell. Neutralizes acids on contact.
Oil
Creates 20-foot radius of magical darkness for 1 hour. Even magical/nightvision cannot penetrate. One use. Black oil that absorbs light. Evaporates completely when effect ends.
Oil
Prevents rot/spoilage/decomposition for 1 month when applied to organic matter. One use. Clear odorless oil. Used by travelers for food and scholars for specimens.