This sticky black unguent is thick and heavy in the container, but it flows quickly when poured.

The oil can cover a Medium or smaller creature, along with the equipment it's wearing and carrying (one additional vial is required for each size category above Medium).

The affected target then gains the effect of a Freedom of Movement spell for 8 hours.

Alternatively, the oil can be poured quickly on the ground, where it covers a 10-foot square, duplicating the effect of the Greasy Sludge spell in that area for 8 hours.

The glass vial is curiously heavy in your hand, and the thick black glop within scarcely moves along with your motions. The stopper is tightly wedged deep within the vial’s neck, past the pronounced lip which is added for an easier pour.