Disclaimer: All people from Harry Potter belong to J.K. Rowling. Not me.
Beast
There is a man, inside is a beast.
Two minds in a body; only one can rule.
One mind on human blood must feast,
The other, right now, himself feels a fool.
There is a man, inside is a beast.
All it took to change him was one simple bite.
The life which never begun now has ceased.
Of that he is reminded every night.
There is a man, inside is a beast.
His life is a story, his thoughts are a book,
But the pages are torn and the pages are creased,
And nobody now dares to come take a look.
There is a man, inside is a beast.
The mind the man reigns over, until full moon.
Then what was the most then becomes the least,
The monster inside leads the man to his doom.
There is a man, inside is a beast.
Inside is a lock, and he's missing the key.
For inside him, his life and heart is pieced,
But some pieces are missing, and always will be.
There is a man, inside is a beast.
The light of the moon makes the beast attack.
He is reminded, by the deceased:
The past is behind, you can never go back.