Brenatto’s Voltaic Bolt

You charge your ammunition, such as an arrows or a crossbow bolts, with electrical energy.
The next time you hit with a ranged weapon attack during this spell’s duration, your attack deals an extra 3d6 lightning damage.
Additionally, the target must succeed on a Constitution saving throw or it can't take reactions until the start of its next turn.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 for each slot level above 2nd.