The Children of Death

It all started when he asked Death to make him immortal.
Death was lonely.
And so he made a friend. He made a friend, and then another. And another. And another. And his friends lived happily. But like all living things, they must die.
And he must reap them.
And so he was lonely.
Until the day, many millennia having passed, a man suggested to him that there is another way. But no one knew the consequences of that decision.
No one could have guessed the consequences when the Children of Death rebelled against their father.