Nundu

The Nundu is a giant mammal similar to a leopard that is native to East Africa. It moves silently, despite its "gigantic" size, and is considered by some to be the most dangerous creature alive. The breath of the Nundu is toxic and filled with disease. This alone can wipe out entire villages of people. The Nundu is extremely hard to subdue and has never been defeated by less than around one hundred wizards working together. Compared to the dragons used in the Triwizard Tournament, which were stunned into submission by around ten wizards, the prospect of this rare beast becomes truly terrifying.