Fluffy is the tree headed dog that protects the Hogwarts Chambers.Which contains the Sorcerer's Stone.There are Five Professors and the game keeper.Each one has left something to protect the Stone.Hagrid the game keeper left Fluffy.Professor Sprout left the Devil Snare.Professor Flitwick left a room full of key only one opens the door.Professor McGonagall transfigured the chessmen on a Wizard chess board to make them come alive.Professor Quirrell left a troll to guard the door to the next room.Professor Snape left a Logic quiz because wizards have not one ounce of Logic
