The most likely reasons are if it's sacrificed, if it's legendary and another legendary creature with the same name is controlled by the same player, or if its toughness is 0 or less.
This was a slog, but 14 picks up so hard afterwards More Recent Game: Final Fantasy Strangers of Paradise/ 8 for mainline games

These critters cant hang: Arasta of the Endless WebArasta of the Endless Web, Bastion of RemembranceBastion of Remembrance, Cache GrabCache Grab, End-Raze ForerunnersEnd-Raze Forerunners, Gourmands TalentGourmands Talent, Moldervine ReclamationMoldervine Reclamation, Squirrel SovereignSquirrel Sovereign, Whisper, Blood LiturgistWhisper, Blood Liturgist, Wolfwillow HavenWolfwillow Haven Heres our non-budget upgraded list for Squirreled Away : Squirreled Away Non-Budget Upgrade View on Archidekt Commander (1) 1 Hazel of the RootbloomHazel of the Rootbloom Creatures (27) 1 Academy ManufactorAcademy Manufactor 1 Beledros WitherbloomBeledros Witherbloom 1 Champion of LambholtChampion of Lambholt 1 Chatterfang, Squirrel GeneralChatterfang, Squirrel General 1 Chittering WitchChittering Witch 1 Craterhoof BehemothCraterhoof Behemoth 1 Deep Forest HermitDeep Forest Hermit 1 Gilded GooseGilded Goose 1 Hazel's BrewmasterHazel's Brewmaster 1 Honored DreyleaderHonored Dreyleader 1 Jaheira, Friend of the ForestJaheira, Friend of the Forest 1 Marionette ApprenticeMarionette Apprentice 1 Mirkwood BatsMirkwood Bats 1 Moonstone EulogistMoonstone Eulogist 1 Morbid OpportunistMorbid Opportunist 1 Nadier's NightbladeNadier's Nightblade 1 Ogre SlumlordOgre Slumlord 1 Old GnawboneOld Gnawbone 1 Peregrin TookPeregrin Took 1 Ravenous SquirrelRavenous Squirrel 1 Scurry of SquirrelsScurry of Squirrels 1 Scute SwarmScute Swarm 1 Tendershoot DryadTendershoot Dryad 1 The Odd Acorn GangThe Odd Acorn Gang 1 Tireless ProvisionerTireless Provisioner 1 Toski, Bearer of SecretsToski, Bearer of Secrets 1 Valley RotcallerValley Rotcaller Artifacts (10) 1 Arcane SignetArcane Signet 1 Bootleggers' StashBootleggers' Stash 1 ChitterspitterChitterspitter 1 Golgari SignetGolgari Signet 1 Idol of OblivionIdol of Oblivion 1 Lightning GreavesLightning Greaves 1 Maskwood NexusMaskwood Nexus 1 SkullclampSkullclamp 1 Sol RingSol Ring 1 Talisman of ResilienceTalisman of Resilience Enchantments (9) 1 Awakening ZoneAwakening Zone 1 Beastmaster AscensionBeastmaster Ascension 1 Binding the Old GodsBinding the Old Gods 1 BitterblossomBitterblossom 1 Black Market ConnectionsBlack Market Connections 1 Parallel LivesParallel Lives 1 Phyrexian ReclamationPhyrexian Reclamation 1 Revel in RichesRevel in Riches 1 Squirrel NestSquirrel Nest Sorceries (5) 1 ChatterstormChatterstorm 1 Decree of PainDecree of Pain 1 Rootcast ApprenticeshipRootcast Apprenticeship 1 Shamanic RevelationShamanic Revelation 1 Swarmyard MassacreSwarmyard Massacre Instants (8) 1 Deadly DisputeDeadly Dispute 1 Heroic InterventionHeroic Intervention 1 PutrefyPutrefy 1 Return of the WildspeakerReturn of the Wildspeaker 1 Saw in HalfSaw in Half 1 Second HarvestSecond Harvest 1 Tear AsunderTear Asunder 1 Windgrace's JudgmentWindgrace's Judgment Planeswalkers (2) 1 Garruk, Cursed HuntsmanGarruk, Cursed Huntsman 1 Tevesh Szat, Doom of FoolsTevesh Szat, Doom of Fools Lands (38) 1 Barren MoorBarren Moor 1 Bojuka BogBojuka Bog 1 Command TowerCommand Tower 1 Exotic OrchardExotic Orchard 9 ForestForest 1 FountainportFountainport 1 Golgari Rot FarmGolgari Rot Farm 1 Grim BackwoodsGrim Backwoods 1 Jungle HollowJungle Hollow 1 Llanowar WastesLlanowar Wastes 1 Mudflat VillageMudflat Village 1 Necroblossom SnarlNecroblossom Snarl 1 Oran-Rief, the VastwoodOran-Rief, the Vastwood 1 Path of AncestryPath of Ancestry 8 SwampSwamp 1 SwarmyardSwarmyard 1 Tainted WoodTainted Wood 1 Temple of MaladyTemple of Malady 1 Tranquil ThicketTranquil Thicket 1 Treasure VaultTreasure Vault 1 Twilight MireTwilight Mire 1 Viridescent BogViridescent Bog 1 Woodland CemeteryWoodland Cemetery And a few more cards to consider: Braids, Arisen NightmareBraids, Arisen Nightmare, Doubling SeasonDoubling Season, Unwinding ClockUnwinding Clock, Ygra, Eater of AllYgra, Eater of All Rodent Ruination Thats it for our Upgrade Guide for Squirreled Away

From a purely aesthetic standpoint, it's a beautiful card, but ultimately, its price is being held back by its viability in both Standard and Limited play right now
Personally I think Im going to grab the Endless Punishment precon and a couple of singles
Each player may play an additional land on each of their turns