Arlo's ember of incineration

You hurl a ember at a creature or object within sight. Make a ranged spell attack against the target. On a hit, the target takes 1d12 fire damage at the end of the creatures turn the creatures takes 2d8 fire damage. A flammable object hit by this spell ignites if it isn't being worn or carried.

This spell's damage increases by 1d12 when you reach 5th level (2d12), 11th level (3d12), and 17th level (4d12).