- "I was summoned from the Dark Realm by Twinrova. See my true form! Feel the might of a dark dragon!"
- — General Onox
The Dark Dragon is the final boss on a normal save file in The Legend of Zelda: Oracle of Seasons. The Dark Dragon is the true form of Onox, the general that overthrew the land of Holodrum by kidnapping Din, the Oracle of Seasons, thus throwing the seasons of the land into chaos. After he is defeated in his humanoid form, the floor crumbles and the Dark Dragon reveals itself.
The Dark Dragon has four different attacks. His first attack consists of attempting to smash Link with either one of his hands. His second attack is to sweep one of his hands across the screen. Either of these first two attacks can easily be blocked using the Iron Shield, moving Link out of harm's way. His third attack is to shoot blue fire out of his mouth, which linger on the screen for several seconds. His final attack is shooting a large amount of fireballs down the screen sweeping from left to right while alternating between firing left and right.
This battle is fought in a side-scrolling fashion. The dragon's body is completely impervious to any attack, but his one weakness is the red jewel on his head. If Link strikes the jewel enough times, the Dark Dragon is eventually defeated. This is easier said then done; in order to even reach the jewel, Link must dodge one of the Dark Dragon's hand attacks and then jump onto his hand. After this, Link must jump from the hand to the jewel and hit it with his sword in midair. If timed right, Link can land on the Dark Dragon's other hand after slashing his face.