Knight has an effect that makes it unable to be destroyed by battle while you also control a Number monster, referencing the anime-exclusive effect of the Number monsters that made them unable to be destroyed by battle except by another Number
Paradoxical Outcome is the key combo piece in the eponymous Legacy and Vintage Paradoxical Storm decks, where it can be used to replay mana rocks to generate mana also while drawing dozens of cards

Supersize Me View on Archidekt Commander (1) 1 Korvold, Fae-Cursed KingKorvold, Fae-Cursed King Creatures (30) 1 Blood ArtistBlood Artist 1 Bog NaughtyBog Naughty 1 Butcher of MalakirButcher of Malakir 1 Caustic CaterpillarCaustic Caterpillar 1 Dockside ExtortionistDockside Extortionist 1 Eternal WitnessEternal Witness 1 Fleshbag MarauderFleshbag Marauder 1 Gilded GooseGilded Goose 1 GingerbruteGingerbrute 1 Gluttonous TrollGluttonous Troll 1 Hellkite TyrantHellkite Tyrant 1 Marionette MasterMarionette Master 1 Mazirek, Kraul Death PriestMazirek, Kraul Death Priest 1 Pitiless PlundererPitiless Plunderer 1 PlaguecrafterPlaguecrafter 1 Ramunap ExcavatorRamunap Excavator 1 Reassembling SkeletonReassembling Skeleton 1 Sakura-Tribe ElderSakura-Tribe Elder 1 Savvy HunterSavvy Hunter 1 Sifter of SkullsSifter of Skulls 1 Smothering AbominationSmothering Abomination 1 Solemn SimulacrumSolemn Simulacrum 1 Springbloom DruidSpringbloom Druid 1 Sylvan SafekeeperSylvan Safekeeper 1 The Gitrog MonsterThe Gitrog Monster 1 Tireless TrackerTireless Tracker 1 Viscera SeerViscera Seer 1 Wicked WolfWicked Wolf 1 Yahenni, Undying PartisanYahenni, Undying Partisan 1 Zulaport CutthroatZulaport Cutthroat Artifacts (13) 1 Bolas's CitadelBolas's Citadel 1 Commander's SphereCommander's Sphere 1 Crucible of WorldsCrucible of Worlds 1 Golden EggGolden Egg 1 Lightning GreavesLightning Greaves 1 Phyrexian AltarPhyrexian Altar 1 SkullclampSkullclamp 1 Sol RingSol Ring 1 Swiftfoot BootsSwiftfoot Boots 1 Tamiyo's JournalTamiyo's Journal 1 Trading PostTrading Post 1 Treasure MapTreasure Map 1 Witch's OvenWitch's Oven Enchantments (8) 1 Awakening ZoneAwakening Zone 1 Dictate of ErebosDictate of Erebos 1 Goblin BombardmentGoblin Bombardment 1 Krark-Clan IronworksKrark-Clan Ironworks 1 Moldervine ReclamationMoldervine Reclamation 1 Revel in RichesRevel in Riches 1 Trail of CrumbsTrail of Crumbs 1 Ulvenwald MysteriesUlvenwald Mysteries Planeswalkers (1) 1 Liliana, Dreadhorde GeneralLiliana, Dreadhorde General Instants (6) 1 Assassin's TrophyAssassin's Trophy 1 Bake into a PieBake into a Pie 1 Beast WithinBeast Within 1 DeathsproutDeathsprout 1 Giant OpportunityGiant Opportunity 1 HarrowHarrow Sorceries (6) 1 Blasphemous ActBlasphemous Act 1 CultivateCultivate 1 FarseekFarseek 1 Kodama's ReachKodama's Reach 1 Rampant GrowthRampant Growth 1 Taste of DeathTaste of Death Land (35) 1 Blood CryptBlood Crypt 1 Bloodstained MireBloodstained Mire 1 Bojuka BogBojuka Bog 1 Cinder GladeCinder Glade 1 Command TowerCommand Tower 1 Dragonskull SummitDragonskull Summit 1 Evolving WildsEvolving Wilds 1 Exotic OrchardExotic Orchard 1 Jund PanoramaJund Panorama 1 Lotus FieldLotus Field 1 Myriad LandscapeMyriad Landscape 1 Overgrown TombOvergrown Tomb 1 Phyrexian TowerPhyrexian Tower 1 Prismatic VistaPrismatic Vista 1 Reliquary TowerReliquary Tower 1 Rootbound CragRootbound Crag 1 Savage LandsSavage Lands 1 Smoldering MarshSmoldering Marsh 1 Stomping GroundStomping Ground 1 Temple of MaladyTemple of Malady 1 Terramorphic ExpanseTerramorphic Expanse 1 Verdant CatacombsVerdant Catacombs 1 Wooded FoothillsWooded Foothills 1 Woodland CemeteryWoodland Cemetery 5 SwampSwamp 1 MountainMountain 5 ForestForest Bon Appetit

Its especially surprising that its cEDH thats doing it, given that Ophidian Eye costs 3 mana, but apparently this is good enough in some Malcolm, Keen-Eyed Navigator or Niv-Mizzet, Parun decks
These cards are: Luxknight Breacher Petrified Field Edge of Eternities - Luxknight Breacher Luxknight Breacher is a 4 CMC creature card (3 mana of any color, 1 White) with power and toughness equal to 2