Grease level 3 and when the spell ends

and when the spell ends if you are on the Ethereal Plane

the target's only method of movement is a flying speed of 10 feet

At the end of each of its turns

The gust disperses gas or vapor

Grease level 3 and when the spell endsSlick 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. .: Retail fit .: 100% Soft cotton .: Light fabric (4. 2 oz yd (142 g m) .: Runs true