Creeping ice

The caster targets a medium-sized creature or smaller and places a hand on the floor. Ice crawls along the floor towards the intended target. The target has to make a Dex saving throw. On a failed save the target’s lower body is encased in ice that restrains them and they take 1d6 cold damage. At the start of its turn, it can make a strength check to try and free its self from the ice.