Araki's volatile tap

You create a spectral hand to imbue an object within range with volatile force. When a creature you can see touches the object you can use your reaction to cause the object to release the energy, doing so returns the object to its mundane form. The creature must make a Constitution saving throw. On a failed save, the creature takes 8d6 force damage and is stunned until the end of its next turn. On a successful save, the creature takes half as much damage and isn't stunned.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher the damage increases by 1d6 for each slot level above 4th.