Wall of Bubbles

You create a wall of shimmering bubbles. The wall appears within range on a solid surface or floating free and lasts for the duration. You choose to make the wall up to 30 feet long, 10 feet high, or a circle that has a 20-foot diameter and is up to 20 feet high, or a 20-ft. diameter sphere. The wall is 1/4 in. thick, is made from 5 ft. tall and wide sections. The wall is light, and can be moved by medium or higher speed winds if it is floating freely. If the wall moves into a creature's space, it must make a Dexterity save: on a success, the creature is pushed 5 feet away from the wall, and on a failure it is sucked inside of it. Creatures in gaseous form can't pass through it. The wall vanishes when it ends.

A creature can move through the wall, albeit very slowly. For a creature to move through the wall, it must spend an extra 10 feet of movement. Furthermore, when a creature exits the wall, there is a 45% chance the sections it was in contact with break, and a 5% chance the entire wall breaks. The wall can be targeted, and automatically is by attacks and spells from one side to the other that would cross it. It has AC 10 and uses your spell save DC if it must make a save, with disadvantage against attacks and spells dealing Piercing damage; sections of the wall that are hit break.

If the wall breaks, any creature that moved through or was within 10 feet of a broken section must make a Constitution saving throw: on a success its movement speed is reduced to 10, and on a failure, it takes 4d8 Force damage.

Using a Higher-Level Spell Slot. The area increases by 10 feet for each spell slot level above 3.