the intro on this is piano with the guitar using this really odd pedal to make all these
effects, but then lead guitar comes in with the main riff.
[ Tab from: https://www.guitartabs.cc/tabs/o/ozzy_osbourne/nightmare_tab.html ]
intro w/dist.
|----------------------------------------|
|----------------------------------------|
|----------------------------------------|
|--5555-5555-88-1010--5555-5555-1010-88--| x2
|--5555-5555-88-1010--5555-5555-1010-88--|
|--3333-3333-66-8-8---3333-3333-8-8--66--|
you keep doing this for the verse and interlude.
billy_talent_dg