The story is also related to the legendary wishing monkey paw with dark power (see the classic horror novel Monkey paw three wishes). Jake accidentally got the monkey's paw and made a wish, but the realization of the wish also killed his good friend cobb. So he used the magic of monkey's paw to save his good friend. Who knows, those who come back are no longer the original friends, and there are more dark forces. And that force forced Jake to fulfill three wishes, and things became more and more out of control.