Have you ever heard of the Hydra from Greek mythology? That nine-headed snake that would sprout another head unless you burned its head stub? Well, there actually are real many-headed snakes in this world. But a public service announcement:
FIVE-HEADED COBRAS ARE NOT REAL!
Watch this video. Notice that the heads are separated. But don't get your hopes up about keeping a hydra. Most of them don't survive in captivity and wouldn't survive in the wild either. No, not even in Greece. Even professional breeders and herpetologists usually struggle with keeping snakes with multiple heads.
Video of two-headed Honduran Milk Snake eating