Holy Handaxe

Weapon (handaxe), very rare (requires attunement by a good-aligned character)

You gain a +2 bonus to attack and damage rolls with this gleaming magical mithral handaxe. It is considered a silvered weapon, and when you hit a fiend or an undead with it, that creature takes an extra 1d10 radiant damage.

When you throw the holy handaxe, you can spend a bonus action to cause the axe to return to your hand after resolving the attack. If you are wielding the holy handaxe, you can change the handaxe into a battleaxe as a bonus action. The weapon returns to handaxe form if it is out of your grasp for more than 1 round or you spend another bonus action to return it to handaxe form.