I want an old disco song!!!?

The singer in that song starts the song with these words: ONCE UPON A TIME IN A CASTLE OF TRANSILVANIA A GAMBLER WOULD SAID NO FEAR THE REAPER AND THEN HE CAME! i think these are the words i m not sure after that words it starts a music horror (it is all horror song) and after music he starts singing. If someone understood witch song i mean please help me find it!!! thanks a looooot!!!