Beacon-Light 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 spot where the weapon hit sheds dim light in a 5-foot radius until the start of your next turn. The next time the target is hit by a weapon attack before then, the target takes 1d8 radiant damage as bright sparks burst from the spot, and the spell ends.

At Higher Levels. At 5th level, the initial melee attack deals an extra 1d8 radiant damage to the target on a hit, and the spell ends after the target receives two hits. These increase again at level 11 (2d8 and three hits) and at level 17 (3d8 and four hits)