Bee-dozer

A wall of bees springs into existence at a point you choose within range. You can make the wall up to 300 feet long, 300 feet high, and 15 feet thick. The wall lasts for the duration.

When the wall appears, each creature within its area must make a Dexterity saving throw. On a failed save, a creature takes 6d10 poison damage, or half as much damage on a successful save.

At the start of each of your turns after the wall appears, the wall, along with any creatures in it, moves 50 feet away from you. Any Huge or smaller creature inside the wall or whose space the wall enters when it moves must succeed on a Dexterity saving throw or take 5d10 poison damage. A creature can take this damage only once per round. At the end of the turn, the wall’s height is reduced by 50 feet, and the damage creatures take from the spell on subsequent rounds is reduced by 1d10. When the wall reaches 0 feet in height, the spell ends.

A creature caught in the wall can move through it by walking or flying. The force of the bees makes moving through the wall difficult terrain, and each 1 foot of movement requires 4 feet of movement.