Ice Dragon

On top of the new snowy mountains, there will be an Ice Dragon as a new boss. It would shoot ice balls that explode into ice that behaves like frost walker ice. Its ice breath deals extreme frostbite and slows the player, giving it time to ram into you. Killing the dragon would drop its head, and using it lets the player shoot the dragon's ice balls. This would help give the mountain more reason to look for it and make it more rememberable.