When there is no light, only then can one feel the true despair of darkness. Just like the desperation the world had felt a few moments ago, when Arnold had seeming been put out of battle by the one enemy whom the world feared the most. The feeling of despair was strong, yet it did not last for long. For their fears were unfounded. The Deathless was still alive.
Just seeing him walk to the edge of the mountain, felt like the world was witnessing the rise of a new sun. The luminous aura surrounding him took away all of the worries of warriors as well people across the globe. All was not lost. They still had a chance. The sacrifices of thousands won't be in vain. Deathless will avenge all those who died at the hands of Hercules and his army.
