We first saw the ancient Vulcan lirpa weapon in "Amok Time" in Star Trek: The Original Series, when Kirk and Spock fought over the fair T'Pring. These props from "Kir'Shara" in Star Trek: Enterprise were designed as an homage to that episode. Actually, we also saw huge statues on planet Vulcan of ancient warriors wielding lirpas in the director's edition of Star Trek: The Motion Picture and in the opening scene of "The Forge" in Star Trek: Enterprise.