Booming Firebolt

You hurl a mote of fire at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target is pushed back by 5ft and takes 1d10 fire damage. any creature within 5 feet of the target must make a Dexterity saving throw. A target takes 1d8 thunder damage on a failed save, or half as much damage on a successful one. A flammable object hit by this spell ignites if it isn't being worn or carried.

This spells fire damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).

This spell's thunder damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).