Argorok was a dragon that resided in the skies over Hyrule. In The Legend of Zelda: Twilight Princess, it attacked the City in the Sky, home of the Oocoo. To defeat it, Link used the Double clawshot to attach himself to its tail, and used the Iron Boots to weigh it down and drag it to the ground.
After doing that a number of times, the dragon's armor fell off, and the second phase of the battle began. Several Peahats came out of the ground and flew around the top of the arena, allowing Link to clawshot onto them. Argorok tried to breathe fire on Link, and while doing so, Link used his Clawshot to travel from peahat to peahat until he got behind Argorok and latched onto its back, then stabbing him. Link did this several more times, eventually killed Argorok.