Bundimun

 The Bundimun is a magical creature found worldwide. It is a greenish fungus with many eyes, that can destroy a whole house. The secretions of the Bundimun rot building structure, and if a house gets a large enough infestation it can collapse. Scouring Charms can clear out small infestations, but large colonies should be dealt with by the Department for the Regulation and Control of Magical Creatures (Pest Sub-Division). Bundimuns are known to spit out acid that can seriously harm anyone who bothers it. Bundimun Secretions, when diluted, are used in some magical cleaning solutions