Continuum Crash

You target a creature who must make a WIS save upon impact as they are overcome with dozens of reflections of realities they are, were, or could have been part of. On a failure, the target takes 4d6 psychic damage, and is considered stunned for the duration. They may reattempt the save each time at the end of their turn. On a success, they take half damage and are not stunned.

At Higher Levels, you can target 1 additional creature per spell slot beyond 4th.