Antique: Witchfire

From the mystic energy of the Feywild, you draw a brilliant white flame and set it in your enemy's mind and body. One creature of your choice within range that you can see must make a dexterity saving throw. On a failed save, the target takes 3d6 fire damage and takes a -2 penalty to attack rolls until the end of your next turn. On a success, the target takes half as much damage and suffers no penalty.