Dwarven Oil

Wondrous Item

Rare

Can be harvested from a destroyed Dwemer Spider.

Harvesting: Alchemist's Tools (DC 15)
Quantity: 1d4 oil
Creature Condition: Destroyed

Uses: Aversion to Magic, Fortify Illusion Potion, Potion of Vigorous Magicka, Philter of the Phantom

While it is unclear exactly where the dwarven oil comes from, due to their reliance on mined resources, it is likely extracted from the very ground they lived in.