Arcane Firearm Enhanced Fire Bolt

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 takes 1d10 fire damage. A flammable object hit by this spell ignites if it isn't being worn or carried.  ~~ At 5th level you can use your arcane firearm as a spellcasting focus for your artificer spells. When you cast an artificer spell through the firearm, you gain (1d8) to one of the spell’s damage rolls.

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