Debuff Master 

Brave New World is a virtual reality MMORPG with the most expansive world in gaming history--one big enough that its users can earn a living in it. Looking to earn some cash, Tae-Sung Han pours his heart and soul into playing, even becoming master of a strong guild. All is well until a rival guild, Genesis, annihilates them and hunts Tae-Sung down. On the verge of getting caught, a mysterious old man rescues Tae-Sung and presents a new way forward...