Oil of Slipperiness

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 th