Ka-Zar is Kevin Reginald, Lord Plunder, born in Castle Plunder, Kentish Town, London, England. He is the eldest son of Lord Robert Plunder, the English nobleman who discovered the Savage Land. After his mother had died and his father was killed by the barbaric Man-Ape natives of the Savage Land, Plunder was found and raised by the sabertooth tiger Zabu, who possesses near-human intelligence thanks to a mutation caused by radioactive mists. "Ka-Zar" means "Son of the Tiger" in the language of the Man-Apes. Ka-Zar and Zabu are constant partners. Ka-Zar became an expert hunter, trapper, and fisherman, living off the wild land. In the Savage Land, some territories are populated by several human or humanoid tribes, and while most of them are on friendly terms with Ka-Zar, some of them consider him an outlander and an enemy. He acts more like an unofficial general protector, preventing outside commercial exploitation, such as poaching and mining, as well as enforcing peace between tribes and serving as goodwill ambassador to friendly visitors. Kevin Plunder is an athletic man with no superhuman powers. He utilizes a unique style of hand-to-hand combat shaped by years of surviving in the Savage Land. He has developed great skills in hunting, trapping, fishing, foraging, and general survival in the wild. He carries a 12-inch (300 mm) Bowie knife, and occasionally uses a sling, bow and arrow, and other primitive weapons. He can also communicate with some animals. It was revealed in Astonishing Tales #11, scripted by Roy Thomas, that Ka-Zar's and Zabu's physical abilities had been enhanced by passing through some mysterious mist. The mists later endowed other characters (Maa-Gor and El Tigre) with superhuman abilities.