engage in trading activities for "Mesos" or other in-game items. Characters MapleStory characters exist in worlds or servers. Players are able to create multiple characters in each world, though the characters in different worlds can not interact with each other. Each world is similar in content with each other. The worlds are divided into channels, among which characters are allowed to freely switch. The ability to transfer entire characters between worlds was added in December 2007 to Global MapleStory, with restrictions placed on items. In May 2012, this option was removed as it caused a negative impact on character gameplay. When creating a new character, there are eight branches of classes currently available to choose from with three classes that have no specific branches currently: Explorers, Cygnus Knights, Heroes, Resistance, Sengoku, Nova, Flora, and Anima. Beast Tamer, Child of God and Kinesis are classes that currently have no specific branches. Some classes are currently not available in other regions while others are only available at certain times of year. Explorer characters start on Maple Island and begin as a Beginner class. The Beginner is able to advance into one of the five classes: Warrior, Bowmen, Magician, Thief, and Pirate. After choosing their class, further class progression is only allowed within the scope of the first class advancement with advancements at level 30, 60, 100, and 200. Three separate classes, under the adventurer branch, are created differently from normal Adventurers: Dual Blade (Thief), Kinesis (Magician) and Cannoneers (Pirate). Cygnus Knight characters begin as Noblesse class and begin their journey on Ereve. At level 10, they are allowed to class advance into five Cygnus Knight classes, each one parallels to the Explorer class. Upon reaching the level limit of 120, Cygnus Knights are able to change into a level 50 explorer with benefits. Six Hero classes are currently available: Aran, Evan, Mercedes, Phantom, Luminous and Shade. The Hero classes are characters with background stories related to the antagonist of the game, the Black Mage. Aran has the Combo System, a unique feature to the class, allowing them to generate combo counts by hitting monsters, giving them buffs and allowing them to cast combo-consuming skills. Evan is similar to Magicians, but uses a dragon, which fights alongside them. Mercedes is an elven archer who uses Dual Bowguns. Phantom is a Thief character with the ability to mimic skills from Adventurer characters. Luminous is