Hydra is phantom that was born inside gave nameless scuba diver who went into despair. Hydra is the main antagonist of two episodes of Kamen Rider Wizard, The Magic of Food, and 'Today's Life, the Life of Tomorrow. He also appears Kamen Rider vs Kamen Rider Gaim & Wizard: The Fateful Sengoku movie.
Wizard[]
His target to create Phantom a man named Hiroshi Oikawa an artist who had spied on him, and when he decided to attack him, he was soon stopped by two mage, Kamen Rider Wizard and Beast, although Beast declined his help, furious that he had two mages, Hydra decided to run away. After Hydra leaves Oikawa in despair, but Wizard appears and he is forced to fight, in his bookcase Rinko and Shunpei protect Oikawa from damage, then Hydra destroys the painting of Oikawa's dead wife who leaves him in despair.
And with Beast's help, Wizard enters Oikawa and prevents him from becoming a Phantom. Then Wizard fights Hydra alone and shortens her, and switches to Land Style to fight Hydra that dominates him, and then when Wizard gains new rings such as Land Dragon, Gravity Ring and Special Ring to summon Dragon Hell Claws and he swears against Hydra he dies.