Page "Bat'leth" Paragraph 4

According to Star Trek canon, the Klingon Kahless created the first bat ' leth around the Earth-equivalent of 625 A. D. Klingon mythology holds that he formed the blade by dropping a length of his hair into some lava from inside a volcano known as the Kri ' stak Volcano, then cooling, shaping, and hardening it in a lake known as " the lake of Lursor ".

He then united Qo ' noS, the Klingon homeworld, by killing a tyrant named Molor with the weapon, which became known as the " Sword of Kahless ".

The sword was later stolen by a species called the Hur ' q during their invasion of Qo ' noS.

In the Deep Space Nine episode, " The Sword of Kahless ", Worf and another Klingon named Kor rediscovered the artifact, but it was eventually transported into space to prevent them from using it to attack each other.