Blackfire Bolt

You toss a ball of raging black fire at a target. Make a ranged spell attack. On a hit, the target takes 1d8 fire damage. A flammable object hit by this spell ignites if it isn't being worn or carried. On the target's next turn, the target takes an additional 1d6 necrotic damage. 

This spell's damage increases by 1d8 when you cast it with a spell slot above 1st level.