Supposedly the one to reunite the Hallows will be master of Death. The Elder Wand is a wand that is more powerful than any other, and will win it's owner any duel. The resurrection stone is used to cell back spirits of the dead with three turns in the hand. The Invisibility Cloak is just that; an invisibility cloak, no enchantments will work on it. It will remain a cloak of invisibility.