Legends of the Dark King: A Fist of the North Star Story (Japanese: 天の覇王 北斗の拳 ラオウ外伝, Hepburn: Ten no Haō: Hokuto no Ken: Raō Gaiden, 'The Conqueror of the Heavens: Fist of the North Star Raoh Side-Story'), commonly romanized as Ten no Haoh or Raoh Gaiden, is a Japanese manga series by Yuko Osada that was serialized in the Weekly Comic Bunch from 2006 to 2007.

The story centers on the Fist of the North Star antagonist Raoh and depicts his rise to power as the conqueror of a post-apocalyptic world prior to and during the events of the original work.

A global-scale nuclear war has transformed most of the Earth into a barren ocean-less wasteland, resulting in the downfall of modern civilization and a return to a lawless age of barbarism.

With the help of his childhood friends Reina and Souga, Raoh takes on the mantle of the "King of Fist", as he gradually extends his reign, recruiting new allies in the process, while fighting against rival warlords who seek to challenge his authority.

Ten no Haoh was serialized irregularly in Weekly Comic Bunch from issues #231 (March 24, 2006) through #300 (August 24, 2007), lasting a total of 42 chapters (including a two-part epilogue), which were subsequently collected in five tankōbon editions.