War of Emperium (WoE) or GVG Siege is a game feature that allows guilds to fight in order to conquer a castle.
Players belonging to a guild are allowed to enter WoE castles.
Only players belonging to a guild with the Official Guild Approval skill can damage an emperium.
The emperium will only be available at certain hours a week, dependent on server. These periods are known as WoE periods. The castles are still accessible outside of these hours, and PvP does apply.
At the beginning of WoE, characters from guilds other than the castle owner will be teleported out.
The character to deal the last hit against the Emperium claims the castle. All characters with a different guild, allied or not, will be warped out at that point. Only normal attacks can damage the emperium, as all active skills miss (except Gloria Domini and Gravitational Field). After a castle is claimed, other guilds can immediately re-enter and attempt to break the emperium. The last owner before the emperium disappears at the end of the WoE period holds it until the next period.
Guild mates and Allied Guilds are considered allies in castles and can not attack each other. Members cannot be expelled, and alliances cannot be broken, by members inside a castle.
The owning guild of a castle has several advantages. Guardians are summoned upon the request of the castle owner's guild leader. They will automatically attack all non-allied characters. Guild members can also click on Flags outside of the castle to be instantly teleported to a specific location inside the castle.
The follow skills cannot be cast within castles:
Assumptio
Back Slide
Basilica
Endure
Ice Wall
Snatch
Teleport
Skills cast outside the castle will not disappear upon entering. Using items that activate the skill will also fail, but Autocast equipment can grant the skills in a castle.
In the next guide, let's check Strategies for GVG Siege