fountain that is not covered, you get on it and it will lift you into the air, get on the castles window
you have to push all the ballders onto the water then you have to jump onto the windows and your in
the door. Go in and get the bow and arrow. Then go out and run all the way to the other side of the castle
you have to get the key and unlock katya from the cage and then you meet the vampire.
On the formula it is 1 mandrake root, 3 wilted wolfsbane, and 3 garlic extract.