What the Hex Going On?

daphne's friend sharon weatherby invites the gang to stay at the weatherby estate for the weekend while driving the mystery machine the gang sees a man going into a spooky old mansion the gang learns that it is known as kingston mansion haunted by the ghost of ellias kingston later scooby is left to guard sharon's uncle stuart but he mysteriously vanishes  the gang goes to investigate at the kingston mansion where the gang is warned by the ghost of ellias kingston about the weatherby fortune he wants or else everybody in the weatherby house will grow old later the gang finds a book about crystal o macy later the gang goes to the old swami's place in town then the table with the crystal ball starts floating in the air and its the ghost of ellias kingston again he chases the gang until scooby lands on the table the gang finds an important clue a tv camera which the ghost used to get on the crystal ball later the sets a  trap for the ghost by dropping a net on him later he is unmasked as uncle stuart the episode ends with scooby eating turkey legs