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William "Bill" Koblak
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Member

1986- Lethal Prayer - vocals, guitars (as Belial Koblak)  
1990 Acheron (USA-OH) - guitars (as Belial Koblak)  
2001-2003 Warkult - guitars (as Belial Koblak)  
2009- Nocturnus AD - guitars, backing vocals (as Belial Koblak)  

Live musician

1998 Funerus - guitars (as Belial Koblak)  
2002 Incantation - vocals, guitars (as Belial Koblak)  

Guest musician

2000 Harvist - guitars (as Belial)  
2004 Godless (PUR) - guitars (as Bill Koblak)  
2021 Godless (PUR) - guitar solo (as Belial Koblak)  

Personal information

Also known as: Belial Koblak, Belialgoat