Wall of Glass

A wall of glass appears on a solid surface within range. The wall is composed of ten 10-foot square panels, each panel 1 inch thick. A panel has AC 12 and 15 hit points and shatters when it drops to 0 hit points, potentially causing other sections to collapse at your DMs discretion. Each creature within 10 feet of the wall when it shatters must make a Dexterity saving throw, taking 2d10 piercing damage on a failed save or half as much damage on a success. 

The wall is colored as you choose, and can be opaque to transparent. As a bonus action, you can change the walls appearance.

At Higher Levels: When you cast this spell using a slot of 3rd level or higher, the hit points increase by 15 for each slot level above 2nd.