The opening gambit from Led Zeppelin III, Immigrant Song is a tour de force of Plants banshee-like larynx, howling about Viking invaders and the hammer of the Gods. Despite a thunderously foot-stomping riff from Page and the consistently powerful drum riffing from Bonham, this song is all about Plants war-like delivery, shrieking and shouting with pagan imagery and icy undertones. A song that perfectly encapsulates the raunchiness and sheer power of his vocals.