verse riff
E:-0------|
B:-0------|
G:-0------|
D:-2------|
A:-2------|
E:-0--x-x-|

chant riff:
    A
E:----------------------------|
B:----------------------------|
G:--------------2-------------|
D:--2--4--5-4-5----5-4--2-0-2-|
A:----------------------------|
E:----------------------------|

     B
E:------------------------------   -----------   --------------|
B:------------------------------   -----------   --------------|
G:------------------------------   -----------   -4------------|
D:--5--7--8-7-8--8/10--8-7--5---   -0-5-4-2-0-   ----7---5---4-|
A:------------------------------   -----------   --------------|
E:------------------------------   -----------   --------------|

you can peice it together from this
after the verse the riff is played with harmonics somehow...