Thunderbolt

You call a single, massive lightning bolt to strike a creature you can see within range. That creature makes a Dexterity saving throw, taking 5d12 Lightning damage and 5d12 Thunder damage on a failed saving throw, and half as much on a success.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, increase the lightning and thunder damage by 1d12 each for every slot level above 5th.