The album was the first to be released through SIGE records, a label founded by Turner and Coloccia specifically for projects they are directly involved in.

Turner stated: "We feel that in many circumstances artists lose control of and perspective on the albums they release, and the SIGE was created in part to avoid this problem.

Invisible Oranges' Alee Karim described the album as “some of the most beautiful instrumental music I’ve heard in forever” admitting that prior to listening he lacked a “strong impression” of the band.

Commenting on the production he stated that the “artsy and introspective moments sit nicely next to the more bombastic ones” defining the album as “the soundtrack for an Andrei Tarkovsky film with a Michael Bay budget.”[8] Adam Rauf of Blow the Scene summarized the album as “a pensive and complex … with tons of layers and subtleties" as well as "a phenomenal effort with plenty of substance.”[5] Eclectic music website Brainwashed described Mare Decendrii as “moody and complex” an album that “doesn’t fit into any specific genre” with a “cinematic feeling that conjures up a lot of feelings and images”.

[6] The Inarguable summed up the album as “an ethereal, otherworldly journey through distant lands, physical, Earthly or not.”[7] Lyrics by Aaron Turner and Faith Coloccia.