Karl's life is being threatened and there is only one way to change that, he has to eat from the tree. It was said that whoever did would turn evil but will also be made strong, strong enough to protect his pack from the people seeking to destroy them. He is the last of the purest Alpha wolf bloodline seen in centuries, he is the one the prophesy was talking about, the one they said would save his pack from their curse.
Indeed he had been spoken of since the beginning of time in the holy scriptures, it spoke of a boy who would cry wolf and bring all to their knees.
But there is something that is going to hold him back, his mate. He had found her, immediately she had looked into his eyes and asked him where he was going he knew she was the one.
When she had touched his fur with fascination, he had known she was the one he was meant to mate with. A wolf only has one mate throughout their lifetime and he had found his until he discovered she was an enemy, daughter to the one who sought to kill him. Her death would bring life to his pack