Black-Flame Blade

As part of the action used to cast this spell, you must make a melee attack with a weapon against one creature within the spell’s range, otherwise, the spell fails. On a hit, the target suffers the attack’s normal effects, and Black fire engulfs the target the creature takes Necrotic damage equal to your spellcasting ability modifier and you gain temporary hit points equal to the Necrotic damage dealt until the end of your next turn.

This spell’s damage increases when you reach higher levels. At 5th level, the melee attack deals an extra 1d8 + your spellcasting ability modifier. the damage roll increase by 1d8 at 11th level and 17th level.