Elemental Assessor

A ray of spiraling energy springs from your hand and streaks to its target. Make a ranged spell attack. On a hit, the target takes 2d6 acid damage, 2d6 cold damage, 2d6 lightning damage, and 2d6 fire damage.

The type of energy that does the most damage to the target then persists, dealing another 2d6 damage of that type at the start of each of its turns for 1d4 rounds.