Arcane 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 attack's normal effects, and it is surrounded by crackling Arcane energy until the end of your next turn. If the target takes damage from a Spell of first level or higher that you cast before then, it takes additional Force Damage equal to your Spellcasting modifier and the spell ends.

At Higher Levels. At 5th level, the attack deals an extra 1d6 Force damage to the target, and the damage they take when damaged by a Spell increases to 1d6 + your Spellcasting modifier. Both damage rolls increase by 1d6 at 11th level and 17th level.