Big Octorok

The Big Octorok sits frozen inside the large Boss Room of the Temple of Droplets, along with the Water Element. It's not until Link can thaw them that you fight him and retrieve the element. Link finds switches around the dungeon that causes sunlight to pour into the Temple. When enough rays of sunlight are shone on the Octorok, it thaws both the element and the Octorok, to which the Octorok quickly gobbles the element and runs off. Once you find him in the main boss room, he starts spitting rocks out of his snout. Reflecting three rocks at the Octorok while cause the room to freeze, making the Octorok start sucking up everything in sight. Using the Pegasus Boots and Flame Lantern together, make the Octorok's flower "tail" catch on fire, causing him to run around the room, finally crashing into the wall. Repeat the process three times, and the Water Element is yours.