The screams and cries of war echo through the tainted, bloody atmosphere of a long battle between three relentless, merciless factions. Arrows fly through the air, blades are swung overhead, and catapults fling boulders onto legions of men, yet an eery presence and a peculiar light alters the familiar environment. The occasional spell could be heard chanted among the ravages of war, having unimaginable results -- whether it be incredible healing, an unbreakable shield, or an invocation of great destruction. With a broad spectrum of spells, they all stem from an unusual possessor.

Mamodos. Creatures from another world that journey to earth to partake in a war to establish the new king of their realm, binding themselves to a human individual to act as their spell caster and primary ally. A spellbook is assigned to each Mamodo in which contain the commands to unleash their power, each being different from vast diversity of their race. Adding to the diversity of spells that the Mamodos conjure, they all come in many different forms. Some say they've witnessed giant, demonic-looking beings that hold bold strengths and spells, while others could be small children that dominate in the battlefield and unleash unmatched abilities. Making an appearance in this time, the Mamodos have quite the selection of humans to decide on.

The English -- cunning, intelligent, and controlling, with incredible knights that could be seen as unstoppable if they were given the chance to cast spells. In control of a vast amount of land, the English are a common race, their lands being the popular grounds of Mamodo battles.

The Vikings -- brave, stout, and fierce, with driven warriors that thirst for battle and contain many talents in battle, wielding all sorts of weapons. The Vikings are clever with their weaponry, and with the aid of a Mamodo, they can only enhance their advancing battle technologies.

The Chinese -- strategic, traditional, and swift, with a long-line and a perfected art of swordsmanship, their samurais are ruthless in battle and commence incredible techniques. To add the abilities of the Mamodos would make for a fearful army, full of unbeatable strategies.

In a simple battle to overtake land, the three countries utilize their best acts of war to see who it is that will succumb first.

Zatch Bell is about a war of a race known as the Mamodos who are fighting each other until one is left. The only way to kill a Mamodo is by REALLY killing them down, or by burning their book with an offensive spell. The Mamodos depict a human to be the caster of their spells, reciting the words in the book that appear. Through practice, battle, and/or increased emotional relations between caster and Mamodo, newer and more powerful spells will be unlocked. The book is basically full of unreadable, slightly-transparent words, glowing and becoming readable when the caster is of ability.