World of Warcraft: The Burning Crusade is the first expansion set for the MMORPG World of Warcraft. It was released on January 16, 2007 at local midnight in Europe and North America, selling nearly 2.4 million copies on release day alone and making it, at the time, the fastest-selling PC game released at that point. Approximately 3.53 million copies were sold in the first month of release, including 1.9 million in North America, nearly 1.6 million in Europe, and over 100,000 copies in Australia. Gameplay Two new playable races were added to World of Warcraft in The Burning Crusade: the Draenei of the Alliance and the Blood Elves of the Horde. Previously, the shaman class was exclusive to the Horde faction (available to the orc, troll and tauren races), and the paladin class was exclusive to the Alliance faction (available to the human and dwarf races); with the new races, the expansion allowed players to be a Draenei shaman (Alliance), and a Blood Elf paladin (Horde). The level cap was raised by ten, making it 70 (up from 60, established in the original World of Warcraft) in addition to that; a whole new planet, Outland, was released, with associated quests, dungeons, raids, zones, creatures, and cities. In Player versus Player (PvP), a new battleground, Eye of the Storm was introduced with two brackets: one for characters between levels 61–69, and another for level 70 characters. Players are unable to summon flying mounts in this battleground. The Eye of the Storm battleground is only available to those with the expansion. In addition, a new PvP Arena System was introduced as a way for players to fight in 2 vs 2, 3 vs 3, or 5 vs 5 death-match style battles. While the arena system allowed players without The Burning Crusade expansion to partake in skirmish matches, those without the expansion were unable to participate in rated matches, which yield rewards based on a point system. Ladder matches were only accessible by players who have reached level 70. Three arena stages were introduced in The Burning Crusade expansion, including The Ruins of Lordaeron in the Undercity, The Circle of Blood in Blade's Edge Mountains, and the Ring of Trials in Nagrand. Arena matches have taken a more prominent role in World of Warcraft's PvP content, and have developed into an electronic sport. One example of Arena matches as an electronic sport was