Ending the bass riff, play this chord, listen to the song to understand when to play this :
INTRO:
Guitar
e|-----------------
b|13-13-13-13-13-13
g|12-12-12-12-12-12 REPEAT 4 TIMES
d|10-10-10-10-10-10
A|-----------------
D|-----------------
"I WILL REFUSE!!" Repeat this riff during whole the song.
[ Tab from: http://www.guitaretab.com/s/soulfly/31478.html ]
e|----------------------------------------------------------------------
b|----------------------------------------------------------------------
g|----------------------------------------------------------------------
d|----------------------------------------------------------------------
A|---------------------------------7/4-------------------------------7/4
D|-4-4-4-4-4-4-4-4-4-4-6-6-6-6-6-7---4-4-4-4-4-4-4-4-4-4-6-6-6-6-6-7----
Before the chorus
e|-----------------
b|13-13-13-13-13-13
g|12-12-12-12-12-12
d|10-10-10-10-10-10
A|-----------------
D|-----------------
Ending on Gb (4eme fret), dont forget turning E to D.