Arrow of Light

As part of the action used to cast the spell you make an attack with the weapon used as the spells material component except you fire an arrow made of silvery light instead of expending normal ammunition. If this attack hits the weapons damage is converted to radiant, but otherwise the target suffers the weapons normal effects.

In addition if the target is a fiend, or undead they take an additional 1d6 damage.

This spell follows regular centripetal progression with the base damage increasing by 1d6, at levels 5, 11, and 17 as well as the extra damage to fiends, and undead increasing by 1d6 at those levels