a blast of blood-red lightning shoots from your hand to your target. this bolt does 10d8 thunder damage on a failed save and half as much on a success. every target's turn, at the beginning of their turn, does 2d8 psychic damage.

At Higher Levels When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 4th for both thunder and psychic damage