This is a tab for the song 'Verim' off Asphyx's 1991 album 'The Rack'.
I have not given proper indication of the rhythm or 'feel' of the riffs, and I am not 
to write out the structure. It will be pretty easy to work these out when listenig to the 
So here ar ethe riffs, enjoy:

Riff 1 (Light palm muting on 0's)
1-------------------------------------------|
2-------------------------------------------|
3-------------------------------------------|
4-------------------------------------------|
5-2-----------5---------------------5/6-5\3-|
6-0-0-0-0-0-0-3-0-0-0-0-0-0-0-0-0-0-3/4-3\1-|

Riff 2 (with half time feel)(Heavier pm on 0's)
1-----------------------------------------------------------|
2-----------------------------------------------------------|
3-----------------------------------------------------------|
4-----------------------------------------------------------|
5-2-------------5-------------(5)/6-(5)/6-3-----------------|
6-0-0-0-0-0-0-0-3-0-0-0-0-0-0-(3)/4-(3)/4-1-0-0-0-0-0-0-0-0-|

Riff 3 (000 = triplet)
1-------------------------------------------------------------|
2-------------------------------------------------------------|
3-9--------------9-------------12-------------12--------------|
4-x--------------x--------------x--------------x--------------|
5-7--------------7-------------10-------------10--------------|
6--0-000-000-000--0-000-000-000--0-000-000-000--0-000-000-000-|


Riff 4 (Pick the 0's very fast with light palm muting)
1--------------------|
2--------------------|
3--------------------|
4--------------------|
5--------------4-7-8-|
6-000000000000-4-5-6-|

1--------------------------------------------|
2--------------------------------------------|
3--------------------------------------------|
4--------------------------------------------|
5----------------------------------------3/4-|
6-0-0-0-0-3~-0-0-0-0-2~0-0-0-0-1~0-0-0-0-1/2-|