Green-Flame Blade

Action | 5 ft | V/S/M | Instantaneous

Make a melee attack with a weapon. On hit, the target takes weapon damage, and green fire leaps to another creature you can see within 5 feet, dealing fire damage equal to your spellcasting mod.

Cantrip Upgrade: 5th level, +1d8 fire damage to the target, and +1d8 fire damage to the second target.
11th level: +2d8 fire damage to the target, and +2d8 fire damage to the second target.
17th level: +3d8 fire damage to the target, and +3d8 fire damage t