Celestial Blade

You brandish the weapon used in the spell’s casting and make a melee attack with it against one creature within 5 feet of you. On a hit, the target suffers the weapon attack’s normal effects, and the next attack roll made against this target before the end of your next turn has advantage, thanks to the mystical dim light glittering on the target until then.

This spell’s damage increases when you reach certain levels. At 5th level, the melee attack deals an extra 1d8 radiant damage to the target on a hit. The damage increases by 1d8 at 11th level (2d8) and 17th level (3d8).