Hista is the main antagonist in the The Legend of Tarzan episode, "Tarzan and the Challenger". He is a giant red snake who threatens the gorilla family and no one seems able to fight evenly.
Tarzan and the Challenger
Hista appears in the episode as the main antagonist. When the giant snake attacked while Tarzan was having a picnic with Jane, Moyo, one of the gorillas in Tarzan's family, managed to fend off Hista and chase him away for the time being. When Tarzan returned, Moyo boasted about this one-time accomplishment, claiming that Tarzan was too busy being with Jane to protect the family, and challenged Tarzan for leadership of the gorillas. Moyo defeated Tarzan, though only because Tarzan had saved Moyo from an imminent death of being impaled on sharp spikes. Moyo led the family away and, by an error of judgment, into a tar pit. The gorillas soon faced off against Hista again, who was seeking revenge. After some conflict, Moyo and Tarzan cooperated to rescue the family and lure Hista into the tar pit, where the great snake became stuck and sank, forever ending the python's reign of terror.