The Ghoul Bass Tab

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Riff A

G--------------------------------|
D--------------------------------|
A--------------------------------|
E-7-7h8--7-7h8--7-7h8--3--5555---|


Riff B

G-----------------------------------|
D-----------------------------------|
A-----------------------------------|
E-7-7---1-1---5-5-5h6p5h6h5p6h5h6---|


Riff C

G---------------------------------------------------------------|
D---------------------------------------------------------------|
A--------7h9h1097--------7h9h1097---------3h5h653-------3h5h653-|
E-7-7-7-----------7-7-7-------------3-3-3---------3-3-3---------|

Those three riffs comprise pretty much the whole song, maybe with a bass fill or two. 
listen to the song to figure out where to place them.