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). Applying the oil takes 10 minutes. The affected creature then gains the effect of a Freedom of Movement spell for 8 hours.
Alternatively, the oil can be poured on the ground as an action, where it covers a 10-foot square, duplicating the effect of the Grease spell in that area for 8 hours.

**Freedom of movement spell:
**
4th-level abjuration

Casting Time: 1 action
Range: Touch
Components: V, S, M (a leather strap, bound around the arm or a similar appendage)
Duration: 1 hour

You touch a willing creature. For the duration, the target’s movement is unaffected by difficult terrain, and spells and other magical effects can neither reduce the target’s speed nor cause the target to be paralyzed or restrained.
The target can also spend 5 feet of movement to automatically escape from nonmagical restraints, such as manacles or a creature that has it grappled. Finally, being underwater imposes no penalties on the target’s movement or attacks.

Grease spell:
1st-level conjuration

Casting Time: 1 action
Range: 60 feet
Components: V, S, M (a bit of pork rind or butter)
Duration: 1 minute

Slick grease covers the ground in a 10-foot square centered on a point within range and turns it into difficult terrain for the duration.
When the grease appears, each creature standing in its area must succeed on a Dexterity saving throw or fall prone. A creature that enters the area or ends its turn there must also succeed on a Dexterity saving throw or fall prone.