Blade of the Unicorn

This word counts as a magical +2 Short Sword that deals an extra D6 of Necrotic damage.
This sword has 0 charges and gains a charge each time it is used to kill a living creature, up to a maximum of 5. When the sword is fully charged it can expend all the charges to cast Greater Restoration. If the sword is fully charged and the attuned becomes charmed, petrified or has its ability scored reduced then the sword will spend the charges and cast Greater Restoration on the attuned creature.