The Hydra is a minor antagonist in the Disney's television series, Star vs. the Forces of Evil. A giant multi-headed serpent, the Hydra is briefly featured in the last stages of Heroes vs. Villains War.
Heroes Vs Villains War
The Battle at the Horned King's Castle
Featured as one of the monsters, controlled by Ommadon, the Hydra appears at the Horned King's citadel, during the last stages of the war, where it fights the heroes. At first glance, many heroes get frightened by the monster's fierce nature, including the Unicorn and Stanley. However, Avatar and Nemo muster their courage and use some of their power to knock out some of the Hydra's heads. The Hydra then turns his intentions to Devon and Cornwall, where it uses it's flaming breath to incinerate the dragons, only for the two heroes to escape, before it could attempt to do it. Puffin and Icarus then step in the fray and use their flexible skills to mess up with the Hydra's heads. By doing it so, the Hydra ends up tangled itself up, and proceeds to collapse, defeated.