Its fine to play such narrow sideboard cards since over-'boarding isn't a good idea in this deck
The ability to make it indestructible is a reasonable side benefit
Outside of just running this because its fun, I can see it being useful in decks like Pako, Arcane Retriever and Haldan, Avid Arcanist
Aragorn, Company Leader (Colorless, Green, White) Aragorn, the Uniter (Red, Green, White, Blue) Arwen, Mortal Queen (Colorless, Green, White) Arwen Undmiel (Green, Blue) The Balrog, Durins Bane (Colorless, Black, Red) Bilbo, Retired Burglar (Colorless, Blue, Red) Butterbur, Bree Innkeeper (Colorless, Green, White) Denethor, Ruling Steward (Colorless, White, Black) Elrond, Master of Healing (Colorless, Green, Blue) owyn, Fearless Knight (Colorless, Red, White) Faramir, Prince of Ithilien (Colorless, White, Blue) Frodo Baggins (Green, White) Galadriel of Lothlrien (Colorless, Green, Blue) Gandalf the Grey (Colorless, Blue, Red) Gimli, Mournful Avenger (Colorless, Red, Green) Gwaihir the Windlord (Colorless, White, Blue) King of the Oathbreakers (Colorless, White, Black) Legolas, Counter of Kills (Colorless, Green, Blue) Lotho, Corrupt Shirriff (White, Black) Mauhr, Uruk-hai Captain (Black, Red) Merry, Esquire of Rohan (Red, White) The Mouth of Sauron (Colorless, Blue, Black) Old Man Willow (Colorless, Black, Green) Pippin, Guard of the Citadel (White, Blue) Prince Imrahil the Fair (White, Blue) Rise of the Witch-king (Colorless, Black, Green) Samwise Gamgee (Green, White) Saruman of Many Colors (Colorless, White, Blue, Black) Sauron, the Dark Lord (Colorless, Blue, Black, Red) Shadowfax, Lord of Horses (Colorless, Red, White) Shagrat, Loot Bearer (Colorless, Black, Red) Sharkey, Tyrant of the Shire (Colorless, Blue, Black) Shelob, Child of Ungoliant (Colorless, Black, Green) Smagol, Helpful Guide (Colorless, Black, Green) Strider, Ranger of the North (Colorless, Red, Green) Thoden, King of Rohan (Colorless, Red, White) Tom Bombadil (White, Blue, Black, Red, Green) Uglk of the White Hand (Colorless, Black, Red) If this interests you be sure to check out what contents are in the LOTR MTG Collectors Box!
Its a nice uncommon that allows you to shuffle your library or rearrange X cards deep, where X is the mana you spend
In this instance, that's Awakened Skyclave, a 4/4 Elemental Land with Vigilance and Haste
