Thunder Bolt

You hurl a lightning bolt at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 1d10 lightning damage. A flammable object hit by this spell ignites if it isn't being worn or carried, if the target is wearing metal this damage can arc to one other creature within 30ft. If a spell is cast as an action you can use your bonus action to cast this spell.

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