After completing all of the temples, go back to the Snow Sanctuary and speak to the Lokomo there. He will explain how he wants to decorate and will ask that you deliver him a vase. Go to the Ocean Realm, buy a vessel from the fortune teller woman on the island, and deliver it to the snow Lokomo. He will thank you and give you a reward. If you break the vessel, however, he will demand that you buy and bring him a new one.