A miniature tidal wave swiftly moves across the area of affect. Behind the wave forms a sheet of ice that 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 ice 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.