On Martial Island, the great Arena was closed for most of the year except for special occasions. For instance, the space would be opened every year for the annual competition of the different elite clans and the families under their wings. The affair was an entrenched tradition.
Of course, the Arena would also be opened to the locals and the outsiders every three years during the greatest competition that determined the rank of the clans.
In preparation for the triennial championship, it was not uncommon for the elite families to spend the first two years scouring the globe for great talent. While Martial Island was quite xenophobic, they welcomed people with power in their flesh and bones with minimal prejudice.
However, before a champion could join the Martial Island and become a respected powerhouse, they had to prove their mettle by placing well during the triennial championship.