Birgi is a great example of reds fixed place in the color pie
The reason being is that just including cards to milk value over time leads to inconsistency

Release date: 2015-04-17 All Is Dust Artisan of Kozilek Emrakul, the Aeons Torn Karn Liberated Kozilek, Butcher of Truth Ulamog, the Infinite Gyre Ulamog's Crusher Apostle's Blessing Arrest Battlegrace Angel Celestial Purge Conclave Phalanx Court Homunculus Daybreak Coronet Dispatch Elesh Norn, Grand Cenobite Fortify Hikari, Twilight Guardian Indomitable Archangel Iona, Shield of Emeria Kami of Ancient Law Kor Duelist Leyline of Sanctity Mighty Leap Mirran Crusader Mirror Entity Moonlit Strider Myrsmith Oblivion Ring Otherworldly Journey Raise the Alarm Skyhunter Skirmisher Spectral Procession Sunlance Sunspear Shikari Taj-Nar Swordsmith Terashi's Grasp Waxmane Baku thersnipe Air Servant Argent Sphinx Cloud Elemental Cryptic Command Faerie Mechanist Flashfreeze Guile Helium Squirter Hurkyl's Recall Inexorable Tide Mana Leak Mulldrifter Narcolepsy Novijen Sages Qumulox Remand Repeal Somber Hoverguard Steady Progress Stoic Rebuttal Surrakar Spellblade Telling Time Tezzeret the Seeker Tezzeret's Gambit Thoughtcast Thrummingbird Vapor Snag Vendilion Clique Vigean Graftmage Water Servant Wings of Velis Vel Bitterblossom Bloodthrone Vampire

Any players rocking Autochthon Wurm, Shadow of Mortality, Earthquake Dragon or Draco will be in for a surprise
Were no legal experts, but it seems very unlikely that either of these things will pan out
No hunting down 100 individual cards across multiple sellers, no waiting on separate parcels, no cards lost in transit everything arrives together in one shipment, ready to sleeve up and play