Slimy Oil

Slimy Oil is a treasure.

Source
Slimy Oil can be found as a collectible in the following area: It can be obtained as a drop from the following creatures: Slimy Oil does not drop during the Hekatontoad + Gigantoad Timed Quest.
 * The treasure spot marked on the map west of Aracheole Stronghold, which is at the foot of the rock wall past the enclosement where the Ace of Carapace sidequest takes place.
 * Gaiatoad - 75% chance (Hunt only; normal enemy drops Fine Slimy Oil instead)
 * Gigantoad - 75% chance
 * Hekatontoad - 75% chance