Wall of Blocks

You create a 5 ft wide wall made of playing blocks before you. It has an AC of 15, 5 hp and gives half cover. If reduced to 0 hp, the wall falls apart and does not give half cover any more.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the wall's width increases by 5 ft for each slot level above 2nd.