User with this ability either is or can transform into a Transcendent Dragon, a powerful draconic being who has ascended to true godhood either through powerful magical feats or by divine intervention.
Transcendent Dragons are often several magnitudes above other dragons and draconic beings in terms of physical stats, possessing godlike stamina, speed, strength, etc. Also, they might even be truly immortal.
After merging with Fou-Lu, Ryu (Breath of Fire IV) became the Yorae Dragon a divine dragon-like being whose power rivals that of all of the Endless.
Shinryu (Final Fantasy) wields such destructive power that even gods fear him.
Grima (Fire Emblem) is the Fell Dragon, wielding power massive enough to raise a legion of undead and bring the world to ruin.
Naga (Fire Emblem) is the Divine Dragon, and Grima's polar opposite.
As Naga's daughter, Tiki (Fire Emblem) is also a Divine Dragon, and possesses such vast power that if she were to degenerate, the world would be destroyed.
Daurgothoth, the creeping doom (Forgotten Realms) has transcended the limitations of the dragon species as a whole, becoming a virtually divine dragon who powers surpass that of all dragons and is near-equal to the dragon gods.
After absorbing all the demon chi of his demonic relatives, Drago (Jackie Chan Adventures) became a nigh-all powerful god-like dragon.
Kavaxas (Teenage Mutant Ninja Turtles 2012 TV series), is the lord of the demodragons that reside within the Netherworld. As a being not of the physical reality, Kavaxas possesses abilities that surpass that of mortals.
Acnologia (Fairy Tail) is the strongest dragon in the story, known as the Dragon of the Apocalypse, which no one, not even Igneel the King of the Fire Dragons, could have stand a chance against him in the fight.
While generally laid-back and carefree, Quetzalcoatl/Lucoa (Miss Kobayashi's Dragon Maid), is a former goddess, and even by dragon standards incredibly powerful.
Velezark (Fire Emblem Warriors) is a powerful Chaos Dragon, able to consume dimensions and manipulate space and time.
The Golden Dragon (Captain N: The Game Master) is a godlike dragon whose power rivals that of all other dragons, including the Dragon Lord.