The band wrote the following about the seventh release of The History of Heavy Metal:
Progressive metal merged the progressive rock of the 70's with the heavy metal of the 80's. The genre gained popularity in the early 90's and has since taken a lot of different directions. At about the same time a creative wave of new subgenres in many variations swept ashore in the metal community. Some of them were different forms of alternative metal while others explored and extended different types of extreme metal.
We decided to pay tribute to this highly creative period in the history of heavy metal with a progressive opus in three parts:
Part I: Progressive Power
Part II: Alternative Alternatives
Part III: Extreme Evolution
Line-up:
THE EVERGROWING TREE (PART I)
Johannes Støle: clean lead vocals, synth solos, keyboards
César Moreira: extreme lead vocals
Torfinn Sirnes: guitars, keyboards
Daniel Palmqvist: guitar solos
Roger Pedersen: fusion guitar solo
Rudolf Fredly: bass
Hugo Ribeiro: drums
THE EVERGROWING TREE (PART II)
Haris Dekanović: lead vocals
César Moreira: extreme background vocals
Torfinn Sirnes: guitars
Vini Assis: "Dimebag" guitar solo
Stein Arild Grønås: second "death 'n' roll" guitar solo
Eirik Solheim: bass inspiration
Ståle Gismarvik: bass
Hugo Ribeiro: drums
THE EVERGROWING TREE (PART III)
Ernst Eielsen: lead vocals
Johannes Støle: lead vocals
César Moreira: extreme lead vocals
Kirsten Jørgensen: female vocals
Torfinn Sirnes: guitars, keyboards, german vocals
Steffen Horn: piano
John Lind: bass
Hugo Ribeiro: drums
Produced by Torfinn Sirnes
Mixed by Stein Arild Grønås
Mastered by Christian Obermayer at Strype Audio, Oslo, Norway.
Symphonic black metal part mastered by Rudolf Fredly at Sweetspot Studio
Cover art by George Papas at Dystopia Arts
Video animation by Absynthe Moon Films