However , the brothers are shocked to discover that the Philosopher 's Stone is made by sacrificing human lives .
Fortunately , they are able to recover a copy of Marcoh 's notes from Sheska , a former librarian .
The brothers are shocked to discover that the Philosopher 's Stone is made by sacrificing human lives .
Fortunately , they are able to recover a copy of Marcoh 's notes from Sheska , a former librarian .