Divine Lightning

You hurl a ball of lightning at a target within 60 feet. Make a ranged spell attack against the target. On a hit, the target takes 1d10 lightning damage. The caster’s spell-casting attribute modifier is added to the damage. The attack has advantage against a target wearing metal armor.

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