Vero Aiudi: Lead and backing Vocals
Lead vocals tracks: 1,2,3,6,12. Backing vocals tracks: 2,3,5,6,7,11,12.
Victor Rivarola: Lead and backing Vocals - Keyboards - Acoustic Guitars
Keyboards tracks: 3,6,9. Lead vocals tracks: 2,7,12.
Backing vocals tracks: 2,3,7,11. All acoustic guitars on track 10.
Gerardo Elsegood: Lead & Rhythm Guitars
Lead guitar tracks:2,3,6,7,12, rhythm guitars tracks 3,6,7,9,12. Acoustic guitars on track 6.
Norberto Roman: Drums & Percussion.
Beto Vázquez: Bass - Keyboards - Programming
Keyboards tracks: 4,7,8,10,11,12. Programming tracks: 8,10,12. Acustic bass track 10, backing vocals track 7.

Antti Railio (Celesty): Lead & backing vocals track 11.
Sonia Pineault (Forgotten Tales): Lead & backing vocals track 8.
Aldo Lonobile (Secret Sphere): Lead guitar solo 1&2 track 5.
Quinn Weng (Seraphim): Lead & backing vocals track 9.
Nahor Andrade (Dynasty): Lead & backing vocals track 5.

J.P. Kilberg (Magika): lead & rhythm guitars track 11.
Diego Valdez (Eidyllion): lead vocals track 5, chorus track 11&12.
Pato Larralde (Sauron): chorus tracks 7, lead vocal track 12.
Adrian Subotovsky: lead guitar solo 2 track 2.
Carlos Ferrari (LHermite): acoustic guitar tracks 8&12, rhythm guitars tracks 4,5,8,12, lead guitars tracks 4&8.
Lucas Pereyra: rhythm guitar track 2, piano solo track 7, programming tracks 1,2,5,7,9.
Pablo Soler: lead guitar solo 3 track 5.
Sebastian Cast: Forewords & lead vocals track 12.
Ramiro Escobar: keyboards track 5.
Rocio Vilela: chorus tracks 5,6,11, lead vocals track 12.
Julian uJuarez: chorus track 12.
Karina Varela: (Dominus Inferi): chorus track 12.
Nora Vazquez: chorus track 7.
Estefania Encina: chorus track 7
Sony Bonini: chorus track 7 - Dialogue intro track 8 Vero Aiudi & Ximena Udrizar.

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Wikipedia