Vestige of Solis

You summon a flaming rock to strike one creature within range. Make a ranged spell attack against the target. On a hit, the target takes 4d10 bludgeoning damage. Hit or miss, the rock then explodes. The target and each creature within 15 feet of it must succeed on a Dexterity saving throw or take 4d6 radiant damage.

At Higher Levels. When you cast this spell using a spell slot of 5th level or higher, the radiant damage increases by 1d6 for each slot level above 4th.