Slick grease covers the ground in a 10-foot radius 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.

For the duration, the area is flammable. If any creature or object in the area is on fire or takes fire damage, the whole area catches fire, dealing 2d6 fire damage to all creatures in the area. If the area catches fire, the spell ends immediately.