Croton 🍞 on Twitter: "There are only 3 dragon parts you can find loosely in #BreathoftheWild, one fang from each of the 3 dragons in Hyrule Castle. ...now I never noticed this
Hyrule Castle Chest : r/tearsofthekingdom
Destroy Ganon - The Legend of Zelda: Breath of the Wild Guide - IGN
Breath of the Wild Walkthrough – Hyrule Castle - Zelda Dungeon
Found a magical chest full of them in Hyrule Castle! : r/Breath_of_the_Wild