A stadium and entertainment complex built in Tatroi. Home to not only the finest battle tournaments in all the land, but also to the burgeoning underground bunny race circuit, both of which provide major contributions to the town's bustling economy. The colosseum is built and maintained by a millionaire merchant trader, and even the Astral Knights are forbidden to interfere with its operations; it is instead patrolled by a private security detail. Also referred to by some as the Tatroi Arena.