Thunder Roulette

A bolt of lightning streaks from the sky to strike one creature within range. The creature is randomly determined by the DM. The creature must make a Dexterity saving throw, taking 2d8 lightning damage of a failed save, or half as much damage on a successful one. If this spell is cast again by any spellcaster withing 1 minute, the same creature is struck.

At Higher Levels. This spell's damage increases by 1d6 when you reach 5th level (3d6), 11th level (4d6), and 17th level (5d6).