Coarschepp's Instant Barrier

A transparent barrier of magical force appears at a point within range. The wall is 1 inch thick and can be up to 10 feet in both height and width. It appears in any orientation you choose, horizontally or vertically, but it must be touching another solid surface or barrier. The barrier has an AC of 15 and 15 hit points. The barrier lasts for the duration, unless it's reduced to 0 hit points or you dismiss it (no action required).

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the barrier's hit points increases by 10 for each slot level above 2nd.