Blasting smite

The next time you hit a creature with a melee weapon attack during the spell’s duration, your weapon gets coated in black smoke, upon hit the smoke ignites and the targets suffers 1d10 fire damage. creatures within 5 feet of the target must make a dexterity saving throw. Upon failure the creature takes the full fire damage ,Upon success the fire damage recieved is halved.

at higher level: When you cast this spell using a spell slot of 2nd level or higher, the extra damage dealt by the attack increases by 1d10 for each slot.