John Perez of Solitude Aeturnus not only produced Well Of Souls' self titled CD, but he also guest appeared on backing vocals on the song "The Realms Of Reverie". John has also played with the band live on two separate occasions. He performed with Well Of Souls at their CD release party in Houston, TX in 2003 on the cover of Candlemass' "Sorcerer's Pledge" and on a cover of Solitude Aeturnus' own song "9th Day". In 2008 in Dallas, TX he again appeared with the band again doing a cover of "Falling" by his band Solitude Aeturnus.