Great Worm of the Earth

With a fearsome roar, an enormous wormlike mouth bursts from the earth beneath your opponent's feet, attempting to swallow him whole.   You conjure a great wormlike maw from the ground beneath the feet of another creature, which immediately bites and tries to swallow that creature.   A successful Reflex save means the creature takes only 4d6 points of damage and the spell ends.   If the creature fails its save, it takes 8d6 points of damage and becomes "swallowed" by the mouth, dragged beneath the ground.   A creature so trapped can't act except to try to escape and takes an additional 2d6 points of acid damage each round on your turn as the worm "digests" it.   Each round on its turn, a creature trapped within the worm can take a full-round action to attempt a new Reflex save to escape. If successful, the creature appears prone in its original space and the spell ends.   An ally in or adjacent to the creature's original space can use the aid another action to help unearth it; a successful DC 10 Strength check grants a +2 bonus on the creature's next Reflex save to escape.   You can place this spell's effect only on a horizontal area of dirt or stone at least 10 feet thick.   Any creature more than 5 feet off the ground can't be affected by this spell.
 

You let out a bellowing roar, calling forth an enormous wormlike mouth beneath your target's feet, attempting to swallow him or her whole. A creature you can see in range must make a Dexterity saving throw, taking 10d6 Piercing damage and being swallowed by the mouth on a failure, or half damage and not swallowed on a success.   While swallowed, the target has full cover from all other creatures and takes 3d6 Acid damage at the start of each of its turns. At the end of its turn, it can repeat the saving throw, ending the effect on a success. When the spell ends, the target appears Prone in its original space, or the nearest unoccupied space if its original space is occupied.   A creature standing in the space the target was swallowed in can use an action to attempt to unearth the target. The target must make a Strength check against your spell save DC. On a success, the target has advantage on its Dexterity save during its next turn.   You can place this spell's effect only on a horizontal area of dirt or stone at least 10 feet thick. Any creature more than 5 feet off the ground can't be affect by this spell.