No one knows who they are or where they came from. All that is known is that a race of multidimensional creatures called the Vadrigar created the Arena Eternal for their own reasons.
The arenas exist to bring together the greatest warriors in the history of the universe. The Vadrigar select only the best fighters and place them in the arenas to fight, to kill, and to die. The battles are endless.
As a gladiator in the Arena Eternal, you have fought your way through the various battlegrounds, caught in the endless cycle of killing, dying and being reborn to kill again. You defeated a plethora of ever more powerful opponents, until finally, you defeated the Lord of the Final Arena, Xaero.
Now you face the one of the Arena Masters - the Vadrigar. You have the opportunity to claim your freedom - or take control of the domain for yourself - if you can survive this final challenge.