[VIDEO]http://www.youtube.com/watch?v=N_D9hqKhAYA]Marduk - Azrael - YouTube[/VIDEO]
Since some of you guys were apparently unaware.
Mention death. Mention fire. Mention something sharp. Quote arcane texts. Delivery is not important as long as the listener can't understand what you are actually saying, make sure they can make out the part about fire and death though. Sexual references are welcome, though not necessary. Insert as many screams as possible.
The only other acceptable style of lyricism is straight up non stop raptor noises.
[VIDEO]http://www.youtube.com/watch?v=pKpWZJxcFHU]Anaal Nathrakh - You Can't Save Me, So Stop Fucking Trying - YouTube[/VIDEO]
You forgot the venerable coffee maker approach. Just gurgle constantly.
[VIDEO]http://www.youtube.com/watch?v=XxjJpp1QPCo&list=PL1EEA09D4BADAE278]Gonorrhea Pussy - Incestcontest - YouTube[/VIDEO]