You get the earrings worn by Supreme Kais and their apprentices. Despite being worn so casually, they have incredible properties, allowing two individuals to fuse by wearing one Potara each on opposite ears. The Fusion has the powers and abilities of the two individuals and increases their power by tens of times. The increase in power depends on the compatibility of the two individuals and it will last until the Fusion has run out of energy, but at most 1 hour. Should either of the individuals be a Kai the fusion will be permanent.