Brutal Shell

You assault your target, siphoning strength from them. As part of casting the spell, make a melee attack against a target in range. On a hit, you gain temporary hit points equal to your spellcasting modifier that last for a minute or until otherwise lost, in addition to dealing the standard weapon damage.

This spell's deals an additional 1d8 fire damage when you reach 5th level (1d8), 11th level (2d8), and 17th level (3d8).