 The sword in "The Sword of Kahless" was intended to be the first bat'leth made by, according to Klingon mythology, Kahless himself, which he used to defeat the tyrant Molor and unite the Klingon people for the first time in their history.It was decided that the sword needed to be different from other bat'leths seen on the show, and so a new hardened aluminium prop was ordered after numerous designs by John Eaves were considered on paper.As with the original bat'leth, Dan Curry created the prop.