Due to copyright infringement issues, "Purity" and the interlude track "Frail Limb Nursery" were removed from later editions of the album.
"[7] According to Taylor, the song "was originally called 'Despise' but it didn't work when we tried to put it together… Ross [Robinson] took it and helped us restructure it.
"[8] In an interview, Taylor claimed the lyrics had been written five years prior to the song's release, that only the name had been inspired by the Purity Knight story.
[10] The outro of the track "Tattered & Torn" features the intro to "Frail Limb Nursery" on the later edition of the album, though the latter was never included on any rereleases.
The case was complicated by audio samples from the authoring website being included in "Frail Limb Nursery", the prelude to "Purity".