From: Kevin Wensink
Album: XX
Okay this is the opening/main riff of the song
listen closely and you'll hear it, i'm working on the rest of it so please 
be patient.
Tabbed by SHRooMHEaDRG7

i play a seven string, but you only need a 6 string for the opening riff,
i play it in standard tuning that is ebgdae

     * palm mute
     N.H. Natural Harmonic

            OPENING RIFF/MAIN RIFF
     * * * *                **********
  E---------------------------------------------
  B---------------------------------------------
  G----------------5----------------------------
  D----------------5--5-7-----------------------
  A------------7-7----5-7-0---------------------
  E---0-0-0-0--0-0--------6-6-6-6-6-6-6---------

okay that is the riff, I was shown this by the guitarist for runt, a band that practices
with shroom and opens up for them alot in cleveland, so that is the riff, the following
part i just kinda played by ear,

PLAY THE MAIN RIFF 3 or 4 TIMES, THEN BEFORE JEFF HATRIX SCREAMS-AHHHHHH, AND THE DOUBLE BASS
KICKS IN YOU'LL HEAR A HARMONIC
N.H. for this part, just slide up from five

low e---5-4-3-2-1

When you've done this, then the double bass kicks in and j mann starts with 
"set me free let me be what i am why can't you see? etc..."
Then keep playing the main riff through the song, i'm not sure what the 
chords are for one j man goes "THIS LIFE'S A FIGHT FOR FULFILLMENT INSIDE..." 
but that is the song, enjoy