The first version of the Hall of Challengers is live!
Visit HoC in Agartha, to the left of the Colosseum.
HoC provides a new challenge to players as they level up, as well as providing a fast xp and item grind.
While there are no direct rewards for completing any version of HoC so far, all enemies fought have the same drop rates as they did the first time you met them, minus special story items. This includes XP and special coins.
HoC will serve as somewhat of a "horde mode" as the story progresses, and will be updated regularly with the Colosseum. However, events in the Colosseum expire over time. The progression through HoC will remain available forever.
In a future update, HoC will feature a true max level horde mode, where the player will fight battles until the party is knocked out.
Death in the Pit is not permanent, but you still might want to save before entering.
Good luck!
//Hardytier