You prefer these to A Thousand Years of Opression, Across the Rainbow Bridge, The Dragon's Flight Across the Waves, The Hero, Victorious March, etc ? I'm just answering because I'm surprised, the songs you listed, left alone Fate Of Norns, aren't that much their most enjoyed songs among the metal community :P
was trying to sing like him and well almost blew my voice was doing it wrong and yes theres a technique to singing this if you don't use it or learn it properly youll blow you re voice and sound like shit after that so pls be carefull good luck rock on