Light Dragon TF (TOTK spoilers)
 

https://www.deviantart.com/miraimiru...n-TF-964468545

If you find all the geoglyphs and memory fragments in The Legend of Zelda: Tears of the Kingdom, you can find another memory fragment that shows Princess Zelda transforming into a dragon. The in-game scene doesn't have much process other than her eyes changing, but this fanart fills in some of the gaps.