Orochi (Dragon Quest)

Orochi is the name of the demonic five-headed serpent that terrorizes the town of Jipang in the world of Dragon Quest III. It's also a boss in said game and a recurring monster in the Dragon Quest Monsters spinoffs, where it can be synthesized with four giant monsters: A Wormonger, a Missing Lynx, a Bjorn and an Empyrea. Its specialty are breath attacks but it also hits quite hard.