The Makkuragan is the kekkei genkai of the Niigata clan. It is their link to the shadow realm that they are destined to watch over. The Makkuragan comes in three different forms rather than mangekyou forms that other doujutsus have. Each of these three forms contains a different ability and when put together unlock the full power of the shadow realm. To achive its full power, all three forms must be held by a single person. This is the same curse that the Uchihas have dealt with.