Arena Ferox is an arena in Fire Emblem: Awakening. Located in Regna Ferox, it is where the Khans hold fighting tournaments to determine who will be the full ruler of Ferox. It houses a large open arena with no terrain advantages or disadvantages and has a large crowd around the arena.
During the events of Chapter 4: Two Falchions, after speaking with the East Khan, Flavia, Chrom represents her for the Khan tournament. His opponent is none other than "Marth", who represents the West Khan, Basilio. The two duel for the right of their represented Khan for their right to become the ruling Khan. "Marth" is soundly defeated and the right to power is given to Flavia. After the battle, in acknowledgement of Chrom's skills, Basilio lends his aid by giving him his previous champion, Lon'qu, to his cause.
Arena Ferox has been confirmed as a stage in the upcoming game, on the 3DS version only. The design of the stage floor matches the original map from the game. It's basic form has four raised platforms, three of which are suspended from the ceiling by chains. The fourth is raised by a plank and cannot be passed underneath. It is also a dynamic stage, changing the platforms under currently unknown conditions.