Oil of Slipperiness

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.