bassIntroG-----------------------------| D-----------------------------| A-7777-8888-10101010----------| E--------------------10101010-|( Tab from: http://www.guitartabs.cc/tabs/s/samhain/moribund_btab.html )Riff 2G---------------------------------------------| D---------------------------------------------| A-77777777------------------77777777-77777777-| E---------101010101010101010------------------|Riff 3G------------------------| D------------------------| A-7777-5555-3333---------| E----------------0000----|EndG----------| D----------| A---7-7-7--| E----------|This is pretty much the whole thingerrie did a weird little fill before hedid the 10 in riff 2you can try to figure that outbut this is the whole basics of the song.
Source: http://www.guitartabs.cc/tabs/s/samhain/moribund_btab.html