In the universe there are several fundamental forces at play that ensure balance in all of creation; Light and Dark, Order and Chaos, Good and Evil, Life and Death. Each force, equal to its counterpart but always in opposition, is embodied by a cosmic being that oversees all in its domain and ensures that the delicate balance on which the universe hangs is never disrupted.
There is another among these deities, however; a nameless being said to exist as the opposition of balance itself, a being that seeks the destruction of all creation. It bears many titles but none are its true name as names designate identity, and identity is a force of creation. Commonly it is referred only as 'The Other'. Ever since the dawn of time The Other has been a shadow lurking at the corner of consciousness, it is the dark shadows in one's mind that devour newborn ideas before they can come into being, preventing further creation. For all of eternity it was content at gnawing away at the edges of creation, a constant reminder of how delicate the precious balance truly was, and keeping the gods hard at work to maintain it, but no more. The Other has grown tired of waiting, and it now conspires to destroy the balance and end creation by its own will. It has created a god of its own name, one called The Eater, who has challenged death himself, and killed the very avatar of life's end, taking on his essence, and becoming the new Death.
With Death's powers as his own, the Eater would consume all lives across the cosmos, preventing new life from ever being born, taking the first step in destroying the balance. This was how The Other desired it, but it would not be so. Death sensed the end of his own life approaching, foretold his defeat at the hands of The Eater, and prepared accordingly. Going down to earth, Death reaped several mortals before their time, robbing them of Life's hold and taking them within his domain. Rather than let their souls return to the cycle, however, he split his great scythe, the seat of his power, into equal pieces, and embedded it within each of the mortals he had chosen. He the sent them back to earth, marked with his touch. The once mortals, taken into death's embrace and then sent back to the land of the living, were thus branded as Death's Children. Immortal by any typical means, they now held a fraction of death's power as their own, and thus were rendered living safeguards of the great scythe.
Thus, when the Eater devoured Death and consumed his essence, he lacked the scythe that would allow him to descend to the world of the living and perform the great reaping; he bore Death's title and position, but not his power. Infuriated The Eater created minions of death, reapers who would descend to the mortal realm in his place and kill Death's children, collecting the pieces of the great scythe they possess so thy can be returned to The Eater.
We will be playing the chosen children of death, and our duty will be to prevent the destruction the balance, whatever means be necessary.