Ethereal Arms

Three large, ethereal arms erupt from a 10ft space on ground that you see within range. Any creature within 15 ft from the arms is in risk of being restained

For the duration, any creature that first enters or starts its turn 15 feet from the arms must succeed on a Dexterity saving throw or be restrained by the arms. A creature that starts its turn restrained by the arms takes 3d6 force damage.

A creature restrained by the arms can use its action to make a Strength or Dexterity check (its choice) against your spell save DC. On a success, it frees itself. The caster can also use their action to command the arms to release a restrained creature.