To put this another way, considering you very well could get three treasures on chapter 4, you come out way ahead on mana if your opponent pays for two attacking creatures during the course of the saga
Youll still get one package from TCGplayer if you pay a little extra, and that extra pricing is always less than the 80% or more markup we see for curated decks

Tyranid Precon Upgrade View on Archidekt Commander (1) 1 The SwarmlordThe Swarmlord Creatures (34) 1 AberrantAberrant 1 Atalan JackalAtalan Jackal 1 BiophagusBiophagus 1 BroodlordBroodlord 1 ClamavusClamavus 1 Deathleaper, Terror WeaponDeathleaper, Terror Weapon 1 ExocrineExocrine 1 Forgotten AncientForgotten Ancient 1 Gargoyle FlockGargoyle Flock 1 HaruspexHaruspex 1 Hierophant Bio-TitanHierophant Bio-Titan 1 Hormagaunt HordeHormagaunt Horde 1 Incubation DruidIncubation Druid 1 LictorLictor 1 Magus Lucea KaneMagus Lucea Kane 1 MalanthropeMalanthrope 1 MawlocMawloc 1 NexosNexos 1 Old One EyeOld One Eye 1 Purestrain GenestealerPurestrain Genestealer 1 RavenerRavener 1 Screamer-KillerScreamer-Killer 1 Shaman of the Great HuntShaman of the Great Hunt 1 SporocystSporocyst 1 Termagant SwarmTermagant Swarm 1 TervigonTervigon 1 The Red TerrorThe Red Terror 1 ToxicreneToxicrene 1 Trygon PrimeTrygon Prime 1 Tyranid HarridanTyranid Harridan 1 Tyranid PrimeTyranid Prime 1 Tyrant GuardTyrant Guard 1 Winged Hive TyrantWinged Hive Tyrant 1 ZoanthropeZoanthrope Instants (8) 1 AetherizeAetherize 1 Biomass MutationBiomass Mutation 1 Change of PlansChange of Plans 1 HarrowHarrow 1 Inspiring CallInspiring Call 1 Quandrix CommandQuandrix Command 1 SilkguardSilkguard 1 StarstormStarstorm Artifacts (3) 1 Arcane SignetArcane Signet 1 Herald's HornHerald's Horn 1 Sol RingSol Ring Lands (39) 1 Ash BarrensAsh Barrens 1 Cave of TemptationCave of Temptation 1 Cinder GladeCinder Glade 1 Command TowerCommand Tower 1 Evolving WildsEvolving Wilds 1 Exotic OrchardExotic Orchard 8 ForestForest 1 Frontier BivouacFrontier Bivouac 1 Game TrailGame Trail 7 IslandIsland 7 MountainMountain 1 Opal PalaceOpal Palace 1 Path of AncestryPath of Ancestry 1 Rugged HighlandsRugged Highlands 1 Temple of AbandonTemple of Abandon 1 Temple of EpiphanyTemple of Epiphany 1 Temple of MysteryTemple of Mystery 1 Terramorphic ExpanseTerramorphic Expanse 1 Thornwood FallsThornwood Falls 1 Unclaimed TerritoryUnclaimed Territory Enchantments (9) 1 Bred for the HuntBred for the Hunt 1 Death's PresenceDeath's Presence 1 Hardened ScalesHardened Scales 1 Invigorating Hot SpringInvigorating Hot Spring 1 New HorizonsNew Horizons 1 Primal EmpathyPrimal Empathy 1 Shadow in the WarpShadow in the Warp 1 Simic AscendancySimic Ascendancy 1 The First Tyrannic WarThe First Tyrannic War Sorceries (6) 1 CultivateCultivate 1 FarseekFarseek 1 Hull BreachHull Breach 1 Overwhelming EncounterOverwhelming Encounter 1 Rampant GrowthRampant Growth 1 Tyranid InvasionTyranid Invasion Apex of Evolution What if you wanted to push this deck to it's limit

Boardwiping and reanimating is key for black tribal zombie decks which blue lacks
Remove all counters from target nonland permanent you control
2mv ramp is especially potent in a deck with a commander that costs four mana, since these cards allow you to reliably play 4mv cards a turn ahead of schedule