Nagas are a common deity in Buddhism. They usually appear in the form of a giant cobra, with one head or many heads. Sometimes nagas will use their magic powers to transform into human form. They are often called "dragons" in English and are understood across Asia as being the same as dragons. It is believed that nagas live both underground in their own world and in the world of humans. Some live in the earth in places like caves and caverns while others live in water such as oceans and lakes.