Touch of Grace
From For Companion and Country
Weapon (longsword), rare
You have a +1 bonus to attack and damage rolls made with this magic weapon. This +1 longsword has a silver hilt wrapped in white leather and a gleaming white blade that sheds light out to a 5-foot range when drawn; when it strikes in combat, the light briefly flares. The first time on your turn that you successfully hit a target with it, you may choose an ally within 30 feet to gain 1d6 temporary hit points.
Proficiency with a longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.