According to Star Trek canon, the Klingon Kahless forged the first bat 'leth around the Earth-equivalent of 625 A.D. Klingon mythology holds that he dropped a lock of his hair into the lava from inside a volcano known as the Kri'stak Volcano.
The Klingon Kahless forged the first bat 'leth around the Earth. This was according to Star Trek canon. He dropped a lock of his hair into the lava from inside a volcano. This is what Equivalent of 625 A.D. Klingon mythology holds. This volcano was known as the Kri'stak Volcano.