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.

The grease is flammable. Any 5-foot cube of grease exposed to fire burns away in 3 rounds, dealing 1d4 fire damage to any creature that starts its turn in the fire.