Cranberry Bog

The ground in a 10 ft radius around the caster becomes a waist-deep mire, full of strange red berries. Any creature other than the caster that starts its turn in the bog must succeed a STR saving throw or be caught in the swampy dirt, treating it as difficult terrain. 

If wild shaped and concentrating on the spell, the caster may take the following special actions:

 Once at the start of each of their tuns, before taking any other actions, the caster may choose a point within the bog to emerge from, regardless of where they are. This does not provoke opportunity attacks.

As a bonus action, the caster can center the bog on their location. Any creatures under the effect of the bog may reroll their STR saving throw. The creature may keep this roll or reroll at the beginning of their turn