Empyrean Blade

Weapon (any sword), very rare

Few of these blades remain. They are rumored to have been left on mortal worlds, the weapons of celestial soldiers from some antediluvian war. You get a +1 bonus on attack and damage rolls with this magic sword. In addition, on a hit with the sword, you deal an additional 1d6 radiant damage.

Final Invocation. As an action, you may speak the sword’s command word, causing the blade to shatter and casting banishment (6th-level version, save DC 17).