Hydra, the villain organization in Marvel Universe. Its origin is quite early. At that time, a powerful psychic appeared on the earth, and this psychic was sent to a distant planet because of his strong ability. The purpose of Hydra's establishment is to bring this powerful person back. In order to save or serve the trapped people, the branches and branches of Hydra in each issue have to transport people to the planet where the trapped people are located (now called "Far Star Project") through the Blackstone Portal (the stone that swallowed Gemma appeared at the end of the second season of the American TV series SHIELD). Its symbol is a skull and a snake's foot below. The slogan is "Cut off one head and grow two heads instead", which is consistent with the mythical image of Hyderabad and realized through its endless hybrids. In modern times, the branch of Nazi hydra is generally considered as the hydra organization. During World War II, it belonged to Nazi Germany (later defected to the Nazis), and the Nazi Hydra was only founded by the Red Skull following the concept of Hydra in previous dynasties, not an orthodox Hydra. The Nazi hydra killed Iron Man's father, but it was not destroyed. After the fall of Nazi regime, Hydra infiltrated SHIELD for many times, created panic and chaos under the banner of SHIELD, and gained benefits from the war. Later, it was exposed because of the overthrow of SHIELD, but it forced SHIELD to hide. The orthodox hydra organization was the main source of funds for the Nazi hydra after he left the Nazis.