Azzakh's Sandy Sanctuary

 You transmute the ground around you in a 10 ft radius into roiling quicksand that threatens to crush any who fall in. Lasting for the duration, this ground becomes difficult terrain, and any creature that attempts to move in the space must succeed a Dexterity saving throw or take 2d6 force damage as they begin to sink and the creature is grappled. A grappled creature can repeat the saving throw at the start of each of its turns. On a success, it frees itself and does not take the damage. This does not affect the space the caster is standing in.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.