Tears of the Kingdom
"The form that Ganondorf, the Demon King, attained after swallowing a secret stone attaining his true power. No trace of the original form remains.
Its overwhelming magical strength would shake the skies. The jet-black scales covering it repel any and all attacks, save for those of the one and only Master Sword."
Upon consuming his secret stone, Demon King Ganondorf's eyes turn into those of a dragon's as he lets out a final laugh and is changed by the effects of draconification. He explodes into a furious gloom-filled dragon that snaps Link in its unseen jaws and rockets upward towards the surface. Now transformed into the Demon Dragon, he exits from the top of Hyrule Castle in a manner very similar to the circular ascent of Calamity Ganon in Breath of the Wild, with Link trapped in between its jaws. The Light Dragon then appears, causing the Demon Dragon to open its jaws to attack, which allows Link to break free. The Light Dragon intercepts his freefall, and the final phase of the fight against Ganondorf begins.
Link is unable to return to the ground from this point onward; if Link falls a certain distance, a cutscene will play of the Light Dragon automatically intercepting him and carrying him back up to the altitude of the Demon Dragon. The Light Dragon will also manually attempt to catch Link while falling even before reaching this point.
The fight against the Demon Dragon functions similarly to the first encounter with Naydra in Breath of the Wild, in which Link must shoot and destroy the eyes along that dragon's body. As such, Link needs to skydive onto them and attack them up close, though it is possible to destroy them with arrows or even the elemental explosions from rare gemstones. If the Gloom fire makes contact with Link he will permanently lose a heart, though the setting of the battle, being exposed to sunlight, will cause such damage to heal over time, and the only true way to get Link killed is to take a large number of hits in rapid succession. However, the Demon Dragon moves and attacks slowly enough for the fire to not be a serious threat. Additionally, Link will not take fall damage if he lands on the Demon Dragon, even if he fails to equip the Paraglider, ensuring he has a way to reach and damage the weakpoints in the event he enters the fight without getting the Paraglider at all.
Link can land and walk directly upon the Demon Dragon's body, where he will take gloom damage if he stays on for too long, and attack the eye clusters with the Master Sword until they explode, dealing the Demon Dragon approximately 1/5th of his health. Each of the 5 weak points (4 Eyes and the Secret Stone) have 1200 HP each. The Master Sword will deal 10x the usual damage to them, 4HKO'ing them at base power, and lowering to a 3HKO or even a 2HKO with a good enough fusion and ATK+ food.
After each cluster is destroyed, the Demon Dragon accelerates in its flight to knock Link off of him, and the Light Dragon will return to collect Link for another pass at the Demon Dragon's back. When all eye clusters have been destroyed, the Secret Stone will become visible and glow directly upon the Demon Dragon's head as the sky turns a deep crimson. Link will then have to descend upon it and land there, dealing the final blows directly to the Secret Stone, which will cause the Demon Dragon's final defeat. A cutscene will play, where Link delivers the decisive impaling blow upon the Secret Stone, shattering it, and causing the Demon Dragon to bleed light from its head and perish in a massive, earth-shattering explosion.
If Link does not have the Master Sword before this fight, he automatically collects it from the Light Dragon's head before it officially commences, as it is required to deliver the final blow to the Demon Dragon's secret stone.