There are various rewards from the Ceremony of Chaos.
All winners, and characters winning a draw, receive powerful buffs:
Losing characters receive the Doubtful Herb of Power and Doubtful Herb of Magic buffs as well.
After a winner is announced in either battle version, 1 to 5 Mysterious Boxes appear at random in the arena. Only the Match Winner character can open these boxes to claim the rewards inside. Contents include:
The character obtains the most Mysterious Marks that month is declared as a True Hero when the monthly cycle ends. The declaration is made as a server-wide announcement in the chat window. Spending Mysterious Marks for items before the month is over does not affect the count of how many one obtains. There can only be one True Hero character per server per month: if the highest count of Mysterious Marks obtain is tied between two or more characters, no True Hero winner is declared. The number of Mysterious Marks you collect during a Ceremony of Chaos cycle can be checked by using the /ceremonyofchaos command in the chat window. A character that has True Hero status can obtain exclusive buffs and items from the Mysterious Butler NPC:
The clan of the True Hero character receives a special buff from the Mysterious Butler NPC:
The character that accumulates the most PKs in the match but does not win receives this prize. When opened this item may give one or more Improved Stones of Life R95- or R99-Grade, or possibly a Soul Crystal Fragments. Cannot be exchanged, dropped, or sold.
Even the losers win something! If you are defeated during the match, you receive 2 Mysterious Marks as a participation reward once the match ends. Be sure to stay until the match ends, however; if you leave prematurely you will not receive the reward.