The investigation leads through "OS" (Outer Special zone) and eventually to "Cor," a new hub for high-level operations. New Content & Mechanics
The search for reveals it most prominently refers to a major expansion in Ragnarok Online titled "Illusion." This update continues the "Terra Gloria" storyline and introduces significant new zones and gear. [S17E1] Episode #17.1
Players can obtain Illusion Armor and OS Weapons . These are tailored for both physical and magical builds and can be enhanced with modular enchants. The investigation leads through "OS" (Outer Special zone)
This update isn't just about story; it introduces several mechanical changes and end-game goals: [S17E1] Episode #17.1