Devil Square

Devil Square puts up to 10 players in an arena where Kundun's forces keep spawning right in front of them. You can go in alone or with a team, and the test is simply who lasts and how much you kill. It is a hunting event rather than a duel: players cannot attack each other inside.

Entry needs a Devil's Invitation, made at the Chaos Machine from a Devil's Eye, a Devil's Key and a Jewel of Chaos. Since the Season 20-2 update there is a single invitation for all levels, and old numbered invitations were converted automatically. You register with Charon at the Event Map Square, reached through the warp window or the Devil Square icon that appears when the event opens (20,000 Zen).

Since the Season 21 update Devil Square uses the same entry brackets as Blood Castle, Chaos Castle and Doppelganger: 50–399, 400–799, 800–999, 1000–1199, 1200–1399, 1400–1599 and 1600 or higher, with monsters balanced for each.

• Once the 10 places are filled, nobody else can enter.
• Once inside, you are free to use the warp command.
• If you die, you are sent back to Noria.
• You keep every item that drops inside.
• Your score comes from monster kills, and a higher score gives a larger experience bonus.
• Characters at master level or higher can also get a Mastery Box through the Gremory Case; in Devil Square both party and individual contribution come from monster kills.