Bow Shock

You conjure a longbow of radiant power, shooting an arrow that explodes soon after being fired, forcing all creatures in an area centered on a 10' rad sphere in range to make a Dexterity saving throw. A creature takes 5d12 radiant damage on a failed save, or half damage on a successful one. Creatures who fail also take half the original damage taken by the spell at the end of their next turn.

At the DM's discretion, this can deal nuclear damage instead.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the lingering damage lasts an additional turn for each slot level above 4th.