Argorok

Twilit Dragon Argorok (覚醒炎翼竜 ナルドブレア) is the boss of the City in the Sky, the seventh dungeon in The Legend of Zelda: Twilight Princess. Argorok is a massive dragon that resides in the skies over Hyrule. At one point, it attacks the City in the Sky, home of the Oocca. Interestingly, it is the only holder of a Mirror Shard that is unknown to have been transformed or not.

Battle
thumb|300px|left|Battle with Argorok Argorok is engaged at the very top of the City in the Sky. Link has to fight it while withstanding the severe wind and rainstorm that plagues the area. To complete the first phase of the battle, Link must use the Double Clawshots to climb the pillars around the battle area and attach himself onto its tail and then use the Iron Boots to cause the weight of it to bring Argorok to the ground, the resulting impact removing a layer of its protective armor.

After repeating the drag-down strategy twice, the dragon roars and the remainder of his armor flies off, and the second phase of the battle begins. Several Peahats come out of the ground and fly around the top of the arena, allowing Link to use his Double Clawshots to transport himself in a circle. Once Argorok starts breathing fire, Link can travel around Argorok in order to clawshot himself to an orb transfixed to the creature's back, presumably the Dragon's power source. Link can then strike at the orb with his sword before Argorok recovers. After repeating this process five times, Argorok spurts out fire, and will try to fly away, but, having been weakened and wounded by the battle, falls and explodes in midair, allowing Link to obtain the final shard of the Mirror of Twilight.

Theory
Due to Argorok's reptilian appearance, it is possibly a Lizalfos or Aeralfos corrupted by the Twilight Mirror Shard. However, its name, plus the fact that Argorok is similar to a bird, suggests that it is related to the Kargaroc. Due to this, it may be a twilit Kargaroc or even a twilit Helmaroc King. This, however, creates the issue that Argorok appears to be more reptilian than avian.