You point at an Undead you can see within range that doesn’t have the Incorporeal Movement trait. The target must be standing on the surface of an area of earth or stone that is large enough to contain the target’s entire body and that is at least 6 feet deep, or the spell fails. The target must make a Wisdom saving throw. On a successful save, the target is restrained by earth or stone until the end of its next turn. On a failed save, the target is dragged up to 6 feet under the surface and is incapacitated and restrained until the spell ends. The displaced earth or stone becomes a mound on the surface in the space the target previously occupied. When the spell ends, the target is harmlessly pushed to the surface in the space it previously occupied or the nearest unoccupied space. If you concentrate on this spell for the full duration, the target remains restrained underground until it or another creature digs it out.