Ok I can try to help you a bit here, I've never bothered to tab this out so I'm doing this from memory basically....
During the intro, the bass and rhythm guitars are just chugging that open E string (tuned down as we are to A sharp/B-Flat). Underneath that chugging, I play the chiming "lead" part, which are basically like suspended chords. I'll tab out each chord, which gets strummed out numerous times, I'm not gonna type all of that out lol, I'm sure you can figure out where the changes are...
e--0----------0---------0---------0--------1--------0---------1--------3--------
b--6----------0---------6---------0--------1--------6---------1--------5--------
g--7----------5---------7---------5--------3--------7---------3--------5--------
d--7----------7---------7---------7--------3--------7---------3--------5--------
a--x----------x---------x---------x--------x---------x---------x--------x--------
e--x----------x---------x---------x--------x---------x---------x--------x-------- (dead stop)
The verse, beginning with the lyric "Becoming one with madness...", goes something like this....
----------------------------------------------------------------------------------------------
-----------------------------------------------------------------------------------------------
--------------------------3---3-----------------------------------------------3---3-------
---2----------------------3---3-----2------------------2----------------------3---3----2--
---2----------------------1---1-----2------------------2----------------------1---1----2--
---2-----2-2-2-2-2------------------2---2-2-2-2-------2-----2-2-2-2-2-----------------2--
"..............Becoming........one with madness..............a chaos.......to embrace......................"
Continuing with the rest of the verse below....