It's likely you're thinking of a different game or a different way to obtain dragon dung. However, here's how dragon dung might be used in Lego Harry Potter games:
* In later games: In some Lego Harry Potter games, dragon dung might be needed for crafting potions or for special tasks.
* Using a cheat: Some games might allow you to use cheats to obtain specific items, including dragon dung.
To get help with a specific issue in the Lego Harry Potter game you're playing, please provide the following information:
* Which Lego Harry Potter game are you playing? (e.g. Lego Harry Potter: Years 1-4, Lego Harry Potter: Years 5-7)
* What are you trying to achieve? (e.g., get dragon dung, craft a potion, complete a specific task)
With more information, I can better help you find a solution.