You really want to see this card over the course of a game

Part Four: The Complete Decklist Marneus Spirits View on Archidekt Commander (1) 1 Marneus CalgarMarneus Calgar Token Creators (17) 1 Andril, Flame of the WestAndril, Flame of the West 1 Baku AltarBaku Altar 1 Haunted LibraryHaunted Library 1 Invasion of Tolvada // The Broken SkyInvasion of Tolvada // The Broken Sky 1 Kaya the InexorableKaya the Inexorable 1 Kaya, Spirits' JusticeKaya, Spirits' Justice 1 Lingering SoulsLingering Souls 1 Muster the DepartedMuster the Departed 1 Priest of the Blessed GrafPriest of the Blessed Graf 1 Promise of BunreiPromise of Bunrei 1 Shadow SummoningShadow Summoning 1 Spirit BondsSpirit Bonds 1 Teferi, Temporal PilgrimTeferi, Temporal Pilgrim 1 Teysa, Opulent OligarchTeysa, Opulent Oligarch 1 Thalisse, Reverent MediumThalisse, Reverent Medium 1 The Restoration of Eiganjo // Architect of RestorationThe Restoration of Eiganjo // Architect of Restoration 1 Whispering WizardWhispering Wizard Spirits (20) 1 Ao, the Dawn SkyAo, the Dawn Sky 1 Clarion SpiritClarion Spirit 1 Drogskol CaptainDrogskol Captain 1 Drogskol CavalryDrogskol Cavalry 1 Drogskol ReinforcementsDrogskol Reinforcements 1 Empyrean EagleEmpyrean Eagle 1 Ethereal InvestigatorEthereal Investigator 1 Guardian of FaithGuardian of Faith 1 Hanged ExecutionerHanged Executioner 1 Katilda, Dawnhart Martyr // Katilda's Rising DawnKatilda, Dawnhart Martyr // Katilda's Rising Dawn 1 Millicent, Restless RevenantMillicent, Restless Revenant 1 Moonshaker CavalryMoonshaker Cavalry 1 Myojin of Blooming DawnMyojin of Blooming Dawn 1 Nebelgast HeraldNebelgast Herald 1 Oyobi, Who Split the HeavensOyobi, Who Split the Heavens 1 Phantom GeneralPhantom General 1 RattlechainsRattlechains 1 Selfless SpiritSelfless Spirit 1 Supreme PhantomSupreme Phantom 1 Twilight DroverTwilight Drover Token Synergy (9) 1 Caretaker's TalentCaretaker's Talent 1 Idol of OblivionIdol of Oblivion 1 Inspiring LeaderInspiring Leader 1 Intangible VirtueIntangible Virtue 1 Kambal, Profiteering MayorKambal, Profiteering Mayor 1 Kaya, Geist HunterKaya, Geist Hunter 1 SkullclampSkullclamp 1 Staff of the StorytellerStaff of the Storyteller 1 Tocasia's WelcomeTocasia's Welcome Spirits Synergy (5) 1 And They Shall Know No FearAnd They Shall Know No Fear 1 Breath of the SleeplessBreath of the Sleepless 1 Etchings of the ChosenEtchings of the Chosen 1 Rally the RanksRally the Ranks 1 Shared TriumphShared Triumph Ramp (10) 1 Arcane SignetArcane Signet 1 Azorius SignetAzorius Signet 1 Dimir SignetDimir Signet 1 Fellwar StoneFellwar Stone 1 Orzhov SignetOrzhov Signet 1 Patchwork BannerPatchwork Banner 1 Sol RingSol Ring 1 Talisman of DominanceTalisman of Dominance 1 Talisman of HierarchyTalisman of Hierarchy 1 Talisman of ProgressTalisman of Progress Land (38) 1 Arcane SanctumArcane Sanctum 1 Command TowerCommand Tower 1 Drowned CatacombDrowned Catacomb 1 Exotic OrchardExotic Orchard 1 Glacial FortressGlacial Fortress 1 Godless ShrineGodless Shrine 1 Hallowed FountainHallowed Fountain 5 IslandIsland 1 Isolated ChapelIsolated Chapel 1 Moorland HauntMoorland Haunt 1 Morphic PoolMorphic Pool 16 PlainsPlains 1 Raffine's TowerRaffine's Tower 1 Sea of CloudsSea of Clouds 3 SwampSwamp 1 Vault of ChampionsVault of Champions 1 Watery GraveWatery Grave Stage Two: The Data Room We're onto the last part of this deck tech: the data room

Blues greatest weakness is an inability to deal with resolved threats
It's looking specifically for the fourth mana, not every fourth mana
The only complaint Ive got here is with the artworkthis looks like a combat trick of creature spell because the image pulls focus from the right side of the frame
I think youll see the Cave Guard soon enough in Commander games as a harbinger of bad times