the release of Gold Edition. Several factions were removed from the game, to retain only eight: the original six factions from Imperial Edition, the Scorpion Clan, and the Shadowlands Horde. In addition, all cards in Heroes of Rokugan remained legal for play. Later, in the Dark Allies expansion, Yoritomo's Alliance was re-introduced as the Mantis Clan. The promotional set was A Thousand Years of Darkness, depicting an alternate timeline where the Shadowlands Horde ruled over Rokugan. Instead of a learn to play set, during The L5R Experience (July 2002), simple demonstration decks were freely distributed. The Rain of Blood (Diamond Edition) This arc began in October 2003 with the release of Diamond Edition. It featured all the factions of the Four Winds arc (including Ratling), this time all fully supported. The promotional set was Dawn of the Empire, depicting events surrounding the creation of Rokugan. The learn to play set was The Training Grounds (November 2003). The Age of Enlightenment (Lotus Edition) This arc began in October 2005 with the release of Lotus Edition. Several significant rules changes marked this release, redefining several key concepts of the game. A new faction, the Spider Clan, was introduced at the very end of the Age of Enlightenment, with the release of The Truest Test. The promotional set was Test of Enlightenment, which, unlike previous promotional sets, depicted current events, focused on results of the 2006 tournament season. The learn to play set was The Training Grounds II (July 2006). The Race for the Throne (Samurai Edition) This arc began in July 2007 with the release of Samurai Edition. It featured significant faction changes, with the removal of the Ratlings and the Shadowlands Horde. The latter group was replaced with the newly introduced Spider Clan. The promotional set for the Samurai arc was The Emerald and Jade Champions, again depicting current events within the game, this time centered on the results of the 2007 World Championship. This arc did not feature a learn to play set. The Destroyer War (Celestial Edition) The arc began in June 2009 with the release of Celestial Edition. The story begins with events following the tournament story line of The War of Dark Fire. The promotional set was Forgotten Legacy. A bit apart from the other learn to play sets were The Imperial Gift (Part 1 to 3), released in August 2009 and distributed through Stronghold Stores as