The Ruby Phoenix Tournament reaches its exciting conclusion! The sorcerer Hao Jin is nowhere to be found. The heroes' search for the tournament's grand judge takes them across Tian Xia's legendary Flying Mountains and face to face with a Celestial Dragon. They ultimately reach a dark demiplane where a nefarious otherworldly villain is holding Hao Jin captive. In order to rescue the Ruby Phoenix, the heroes must defeat their ultimate rivals and claim the title of tournament champions.King of the Mountain is a Pathfinder adventure for four 18th-level characters. This adventure concludes the Fists of the Ruby Phoenix Tournament Adventure Path, a three-part campaign in which the players compete in Golarions greatest international fighting tournament. This adventure also includes a gazetteer of exciting demiplanes found across Golarion, lore about fighting tournaments in other corners of the multiverse, and a mountain of new monsters.Each Pathfinder Adventure Path volume contains an in-depth adventure scenario, stats for several new monsters, and support articles to give Game Masters additional material with which to expand their campaign. Pathfinder Adventure Path volumes use the Open Game License and work with both Pathfinder and Dungeons & Dragons 5E.