Mind Blast

You unleash a wave of psychic energy. Each
creature in a 30 ft cone makes an Int save. On a
failure, it takes 4d8 psychic damage and is
stunned for 1 minute. On a success, it takes half
as much and isn't stunned. At the end of each of
its turns, the creature makes another Int save.
On a success, it is no longer stunned.
At Higher Levels. Each extra spell slot increases
the damage by 1d8.