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...