Astral Mark Smite

The first time you land a weapon strike before this spell expires, your blow flares with celestial light. The hit inflicts an additional 2d6 radiant damage, and the creature struck is outlined by shimmering energy. Any invisibility affecting the target immediately ends, the creature glows with dim light in a 5-foot radius, and it cannot become invisible again for the duration of the spell.

Higher-Level Casting. When this spell is cast using a spell slot of 3rd level or higher, the extra radiant damage increases by 1d6 for each slot level above 2nd.