Burning Steel

Your weapon is coated in flame.  As part of the action used to cast this spell, you must make a melee attack with your weapon against one creature within the spell's range, otherwise the spell fails.  On a hit, the target suffers the attack's normal effects plus an additional 2d8 fire damage.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the extra damage increases by 1d8 for each slot level above 2nd.