Leaks about a new boss fight in Genshin Impact in 5.1 hint at what will be a somewhat annoying opponent, at least for some types of team comps. Currently, Natlan only has two world bosses, the Gluttonous Yumkasaur Mountain King and the Goldflame Qucusaur Tyrant but, as the Nation of Pyro expands with future updates, more bosses should be added. These opponents will drop Ascension materials for some of the upcoming Natlan characters in Genshin Impact and one of them, rumored to be arriving with Version 5.1, has allegedly leaked.