Halo: Avenger's Reckoning

''Once upon a time in a far away land, there lived a dog. He had no master, no home, no pack or family to belong to. Ragged and abandoned, he wandered here and there in search of a place to call his own. But no one wanted him, and they always turned him back out into the streets. He was a stray.''

''The dog was small and lean and ugly. He had nothing to live for, yet still he clung to life. A gnawing hunger followed him wherever he went, always reminding him of the sufferings of the past and the things denied to him. The hunger drove him onwards and gave him the will to survive, for in his heart the dog's deepest desire to find a way to sate the endless hunger. Time and time again he came within reach of his goal, but every time it would be snatched away and he was always left with even less than what he had had to begin with.''

''Defeat after defeat beat the dog down, but he was never broken. Nothing could break him, because was already broken. So he staggered on and on, always suffering but never submitting. Loneliness and fear ate away at him, but there was also anger rising up within him. And when the anger met the hunger, he realized things would only be this way as long as he let himself be kicked and cursed and driven out.''

''And so the dog decided to stop being a stray. Instead, the dog decided to become a wolf. But the anger and hunger and loneliness and fear would not go away. The new wolf needed something to hunt. He needed prey.''

And there was another creature who was more than happy to provide it.