The Mars Volta began teasing something not too long ago, and now we know what it is. The Clouds Hill online store now lists La Realidad De Los Sueños, a massive box set featuring the band's entire discography, and some unreleased material. The 18-LP set is limited to 5,000 copies, and features Tremulant, De-Loused In The Comatorium, Frances The Mute, Amputechture, The Bedlam In Goliath, Octahedron and Noctourniquet on 180g black vinyl, as well as Landscape Tantrums ("the unfinished original recordings of De-Loused In The Comatorium), A Plague Upon Your Hissing Children and Eunuch Provocateur ("the unreleased versions from the De-Loused In The Comatorium session"), a photo book of behind-the-scenes shots, and two pins. It's due out April 23, and here's what the whole thing looks like: