Hydra
A hydra has many heads with a serpent's body and can either have wings, or be wingless. Their primary head can never be destroyed by a weapon and if other heads are severed then two grow back in its place. A hydra's breath has a stench that is capable of killing a animal or human It will emerge itself from the swamp and attack local villages and herds of cattle, devouring them with all of its heads.
In Greek mythology, Hercules took his nephew and charioteer Lolaus on a speedy chariot to Lake Lerna to find the terrifying Hydra. Upon reaching Hydra's hiding place he shot flaming arrows to provoke Hydra to come out of hiding. Hercules began slaying heads and they would grow back in double time so he yelled to Lolaus to bring him a flaming torch. As Hercules would sever a head, Lolaus would cauterize the wound to prevent new heads from growing. The final head could not be harmed with a “weapon” so he hit it with the dragon with a club and ripped the head off with his bare hands, burring it immediately in the ground and places a massive boulder on top. After Hydra was dead, Hercules dipped his arrows in the deadly blood to use as killing weapons at a later time.
In Greek mythology, Hercules took his nephew and charioteer Lolaus on a speedy chariot to Lake Lerna to find the terrifying Hydra. Upon reaching Hydra's hiding place he shot flaming arrows to provoke Hydra to come out of hiding. Hercules began slaying heads and they would grow back in double time so he yelled to Lolaus to bring him a flaming torch. As Hercules would sever a head, Lolaus would cauterize the wound to prevent new heads from growing. The final head could not be harmed with a “weapon” so he hit it with the dragon with a club and ripped the head off with his bare hands, burring it immediately in the ground and places a massive boulder on top. After Hydra was dead, Hercules dipped his arrows in the deadly blood to use as killing weapons at a later time.