Following their victory on the 190th floor, Gon and Killua move up to the 200th floor of Heavens Arena. However, they are immediately met with a physical wall of "malice" or pressure emitted by Hisoka and a receptionist, preventing them from registering. Their previous acquaintance, Wing, finally agrees to teach them the true nature of to ensure they don't suffer permanent injury from the "initiation" typical of the higher floors. Key Plot Points
Wing introduces the basic components of Nen (The "Four Exercises"):
As Gon and Killua approach the registration desk, they are halted by an invisible, overwhelming force. Hisoka appears, warning them that they are not yet ready to set foot on this floor.
