Answer:
Hercules courageously attacked the hydra, cutting each head off with his sword, but he soon realized that as one head was severed another grew in its place. Heracles called for help from Iolaus, his nephew, telling him to bring a flaming torch, and as Heracles cut off the heads one by one from the Hydra, Iolaus cauterized the open wounds with the torch preventing them from growing again. Eventually, with the help of Iolaus, Heracles removed all but one of the Hydras' heads. The one remaining could not be harmed by any weapon, so, picking up his hefty club Heracles crushed it with one mighty blow, he then tore off the head with his bare hands and quickly buried it deep in the ground, placing a huge boulder on the top. After he had killed the Hydra, Heracles dipped the tips of his arrows into the Hydras' blood, which was extremely poisonous, making them deadly