Eons ago, in a parallel dimension…
The Ancients, an archaic, humanoid race, were fighting a brutal and endless war. They fought out of ignorance, evil, and hatred. The Ancients slowly discovered a psychic force springing up within many of their armies. This force gave them to power to read minds, and manipulate the brain. Little is known of their mysterious power.
Out of foolishness, and greed, the Ancients stretched their abilities beyond the limits, and spawned creatures, known as Evils. Darkness and unspeakable dread were spread among the stars, and even to parallel dimensions. Swarms of monsters and zombies were unleashed on the Ancient's home world.
The Ancients then reluctantly turned their attention from fighting each other, to fighting the Evils. The Ancient's losses were devastating. Countless numbers of the Ancients were massacred by the enemy.
Before total extermination, the wisest and most powerful Ancient psychic, The Wise One, vowed to protect their power. It must be kept secret before their universe collapsed in the hands of the Evils. And so, The Wise One used the last of his energy to seal the psychic power in one of three ancient stone fortresses.
The Castles.
During The Wise One's last stand, he wrathfully cursed all Evils, living and un-living, dead and in limbo, to be forever bound to guard the castles against any intruder. Two books with their true purposes yet unclear, were hidden in the castles. The third and most important castle held the psychic power of the ancients. The books sat in dust and darkness, circled by their undead guardians, undisturbed.
Until now.