Evanesco

One object or construct of your choice within range that fits within a 1-foot cube is vanished. Vanished objects have been described as being transfigured to go "into non-being, which is to say, everything." Vanishing is often seen as the magical inverse of conjuration.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the cube's size increases by 1 foot for each slot level above 3rd.