Channeling the power of Sorontur the Dark Windlord  you throw a sphere of blue flame infused with dark lightning towards a creature. Make a ranged spell attack against the target. On a hit, the target takes 1d6 Fire damage and 1d4 Lightning Damage

The damage scales with level, with 2d6 & 2d4 at 5th, 3d6 & 3d4 at 11th, and 4d6 & 4d4 at 17th.