In "Skyward Sword", Link is aided by the Three Dragons that guard the three regions of the Surface. Faron the Water Dragon rules over the Parella and protector of Faron Woods, Lake Floria, and the Ancient Cistern that holds Farore's Flame. Eldin the Fire Dragon guards Eldin Volcano. Lanayru the Thunder Dragon created the Ancient Robots and protects Lanayru Desert. Each dragon was entrusted with part of the Song of the Hero, which provides clues on the location of the Triforce. During his quest for Farore's Flame, Link aids Faron, who had been injured while fighting Ghirahim; she leads him to the Ancient Cistern. During his quest for the Song of the Hero, Link encounters Eldin after he is captured and imprisoned by Bokoblins during an eruption. Link learns that the Fire Dragon had caused the eruption, and the dragon apologizes to Link for all the trouble it caused him. Unlike the other two dragons, Lanayru is shown to have died from an illness in the past, forcing Link to go back in time, cure him of his illness, and prevent his death. After Link cures him and learning his part of the song, Lanayru allows Link to take part in the Lightning Round, which allows him to face a boss battle challenge and a Silent Realm challenge for various prizes. If Link completes eight boss battles, Lanayru will reward him with the unbreakable Hylian Shield, the strongest shield in the game.