Earthen Snare

You select one creature you can see within range. The creature must make a Dexterity saving throw. If the saving throw fails, the creature disappears as it is sucked into a small, spherical, extraplanar trap just large enough to hold the creature while allowing it to turn around.
The trap is surrounded by earthen walls that are not impervious to attacks; they have AC 14, 100 hit points, and are immune to all but bludgeoning, piercing, slashing, force, and thunder damage. When the spell ends or the creature destroys the walls, the trapped creature takes 4d6 force damage and returns to the space it originally occupied or the nearest unoccupied space, where it falls prone.