Stormbow

This magical bow grants a +1 bonus to attack and damage rolls you make with it and has 4 charges.
When you fire an Arcane Shot from this bow,
you can deal lightning damage instead of any
other damage type. If you do, you deal an
additional 1d6lightning damage and expend 1
charge. All charges are restored at the end of
a short rest in a thunderstorm or a long rest.