The Appleseed Cast's "Mare Vitalis," released on January 1, 2000, under the Deep Elm label, is a seminal work that masterfully blends post-rock, midwest emo, emo, math rock, and post-hardcore elements. Clocking in at just over 41 minutes, this album is a dynamic journey through intricate guitar work, emotive vocals, and complex rhythms. Tracks like "The Immortal Soul Of Mundo Cani" and "Poseidon" showcase the band's ability to craft intricate, atmospheric soundscapes, while songs such as "Kilgore Trout" and "Storms" highlight their knack for blending raw emotion with technical precision. "Mare Vitalis" is a testament to The Appleseed Cast's innovative approach to genre-blending, making it a standout release in their discography and a must-explore for fans of genre-defying music.