Rearranging the letters of 'A shimmery ornament' (Decoration) gives:
The Rain Man's memory.
(by Jim Banholzer) (2018) (pending approval)
Other related anagrams without their own page:
"Merry Christmas and Happy New Year" -> "Starry hype. Many wrap merchandise." (by Mike Mesterton-Gibbons by hand) (2002)
"What gift from Santa would you like to see under the tree on Christmas?" -> "True wit, harmony, kindness, calm, rest, good future, seat, health, wife too." (by Aronas Pinchas using Anagram Genius) (2008) (pending approval)
"Christmas" -> "Trims cash." (by Jeff Kastner by hand) (2002)
"Christmas" -> "Its charms." (by Joe Fathallah) (2002)
"Christmas" -> "Mist Crash." (by Marcus Preedy by hand) (2012) (pending approval)