Unicorn Skeleton Mask is the twenty-fifth studio album by Omar Rodríguez-López as a solo artist. It was given a "surprise" digital release on January 2, 2013, just a day after the release of Equinox and Woman Gives Birth To Tomato!.

Three of the album's songs, "Sea Is Rising," "Maria Te Canta," and "Bored To Burns" were previously debuted live as instrumental pieces during Omar Rodriguez Lopez Group 2010 tour. These tracks resurfaced in the 2016 Ipecac series with "Sea Is Rising" appearing on the album Corazones, half of the songs present as alternate versions on Zapopan, and with most of the rest surfacing in 2017 as alternate recordings on Zen Thrills.

Since 2014 the album is no longer available to purchase officially, as Rodriguez-Lopez's Bandcamp page has been taken down after a split with Sargent House label.

Parts of a couple of these songs were also used on the following record, ¿Sólo Extraño? as well as its proper release in 2016 of Nom de Guerre Cabal. "Right Of Way" appears reworked in "House in the Sand" / "Life Proves Its Worth" and the drum track for "Tennessee" is present on "Invisible Laziness" / "Bitter Sunsets" before reappearing as "With You If You Give A Damn" on Zen Thrills. As of January 2017, "Names" remains the only track to not be re-released in the Ipecac Series.

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Wikipedia