Mystary is an Evanescence EP that was sold at the acoustic Juanita's show in 2003, shortly before Fallen was released. It was sold at a merch table as an unmarked burned CD with the text "Mystary CD - 5$". It is considered as something like a demo/sampler for Fallen.
It contains two Fallen outtakes: "Farther Away" and the re-recorded version of "My Immortal" (similar to the Band Version, but with vocals, piano and orchestra only) that was originally meant to be placed as track #4 on Fallen. However, their record label Wind-Up preferred the Origin version with added strings.
↑The version of "My Immortal" used for the video and radio single isn't the same as the one off the band's record Fallen. Much to Lee's chagrin, Evanescence's label opted to use the band's demo version of the song on the record instead of the album recording. "The label was stuck on the demo and wouldn't let us use the version we really wanted," Lee said. "We fought back and forth about it and finally we gave in, but we were all so angry about it." - MTV News interview on November 2003