this is my version of the intro in D-G-C-F-A-D tuning (Full-step down)drop C.
this is such an awesome riff and song! i tabbed this by ear, i think it's pretty accurate
:) Enjoy and please rate my tab Thanks!
[*]= pinch harmonic
|-----------------------------------------|
|-----------------------------------------|
|--9-9-9-9--7-7-7-7--5-5-5-5--4-4---4-----|
|--9-9-9-9--7-7-7-7--5-5-5-5--4-4-2-4-----|
|--7-7-7-7--5-5-5-5--3-3-3-3--2-2-0-2-----|
|-----------------------------------------|
|----[7]----------------------------------|
|-----------------[12]--------------------|
|-----------8-------------10--------------|
|-----------8-------------10--------------|
|-------[7]-6---------[7]-8---------------|
|--0------------0-------------------------|
[ Tab from: http://www.guitaretab.com/b/black-sabbath/306550.html ]
|----------------------------------------------------------|
|----------------------------------------------------------|
|----------------------------------------------------------|
|--9-9-9-9---9-9-9-9---9-9-9---5--------7---9--------------|
|--7-7-7-7---7-7-7-7---7-7-7---3--------5---7--------------|
|----------------------------------------------------------|
|----------------------------------------------------------|
|----------------------------------------------------------|
|---9---12-------9---7--------9--12--------7--7------------|
|---9---12-------7---7--------9--12--------5--7------------|
|---7---10-----------5--------7--12-----------5------------|
|----------------------------------------------------------|
|---------------------------------------------------|
|---------------------------------------------------|
|---------------------------------------------------|
|--9-9-9-9---9-9-9-9---9-9-9---4----4--2------------|
|--7-7-7-7---7-7-7-7---7-7-7---2----2--0--5--4------|
|-----------------------------------------3--2------|