Human sacrifice was the practice of killing a person as an offering on an altar, usually to a god or gods. In 2267, when "Lord" Garth of Izar wondered if the unenthusiastic "heir apparent" James T. Kirk might want a larger role in his coronation ceremony, he suggested Human sacrifice instead. After Kirk graciously declined ("No, I wouldn't enjoy that at all."), saying Garth needed him alive, the insane man agreed, saying he had other candidates. (TOS: "Whom Gods Destroy" )