Cresent Flame Arc

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 weapon attack’s normal effects, you then create an arcing flame starting from you initial target arcing to two other creatures within 30ft, all creatures that are targeted must make a dex save or suffer 4d6 fire damage half as much on a success, if the melee attack was successful the initial creature automatically fails its saving throw. A creature may only be hit once per casting of this spell

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1d6 and the amount of extra targets increases by 1