The Guardian (Translate from Vietnamese)

As the ancient gate resonated with deep, rumbling tones and slowly creaked open, the boundary between the two worlds began to fray. From the distant realm, powerful forces simultaneously turned their claws toward the horizon, determined to find the path that would shift the balance of the great war that had been locked in stalemate for countless millennia. The order was transmitted without hesitation: retrieve all the magical crystals lost in the new land, sacred artifacts possessing enough power to determine the survival of an entire species. Even if it meant sacrificing blood, souls, or the destruction of others, no price was too high for them, as long as their opponents did not get their hands on them first. That undeclared conflict silently descended upon the new world, bringing calamity and sorrow. Thousands of innocent lives are swept into the wheel of fate, while humanity remains oblivious to the true cause. Only a handful of people who have seen the truth understand that from that moment on, they have no choice but to stand up, become the last shield, and silently hide the secrets of the other world, even if the price is their own lives.