In the deepest part of the Frost and Snow Wasteland, an endless fog has shrouded the continent since its inception, and the cold wind that scrapes the bones has not been able to blow it away for thousands of years. The "Valhalla", one of the three mysterious regions of the mainland, stands quietly in the depths of the mist, as if waiting for something.

Legend has it that this is the home of the undead, the end of life, and the end of all origins! The Snowland Wolves have guarded this place for generations, each of them a natural predator, wielding a huge sword and axe, and an inexplicable frenzy for combat, even the glittering claws can easily tear open the throats of their foes. The special individual of the Snow Wolf Clan, called "Mad Wolf", is a nightmare for the enemy. Awakening the wild blood, they have developed their bodies to the extreme, and have incredible power! They have even evolved another advanced form - "Berserker"!