These are cards that can be directly purchased via the Wizards of the Coast website and feature unique artwork and cooperations with other intellectual properties such as Spongebob, Marvel, The Walking Dead , etc
For the majority of its history there were two types: the Core Set and the themed expansion sets

Preston Blink | Commander | Paige Smith Commander (1) 1 Preston, the Vanisher Creatures (30) 1 Blade Splicer 1 Captain of the Watch 1 Charming Prince 1 Distinguished Conjurer 1 Felidar Guardian 1 Fiend Hunter 1 Gallant Cavalry 1 Inspiring Overseer 1 Knight of the White Orchid 1 Kor Cartographer 1 Mage's Attendant 1 Meteor Golem 1 Palace Jailer 1 Pegasus Guardian 1 Priest of Ancient Lore 1 Rambunctious Mutt 1 Resolute Reinforcements 1 Restoration Angel 1 Roving Harper 1 Rumor Gatherer 1 Solemn Simulacrum 1 Soul Warden 1 Soul's Attendant 1 Spirited Companion 1 Stonehorn Dignitary 1 Sun Titan 1 Thraben Inspector 1 Wall of Omens 1 Welcoming Vampire 1 White Plume Adventurer Instants (12) 1 Acrobatic Maneuver 1 Cloudshift 1 Cosmic Intervention 1 Ephemerate 1 Flicker of Fate 1 Justiciar's Portal 1 Kabira Takedown // Kabira Plateau 1 Lae'zel's Acrobatics 1 Otherworldly Journey 1 Return to Dust 1 Sejiri Shelter // Sejiri Glacier 1 Swords to Plowshares Sorceries (4) 1 Austere Command 1 Emeria's Call // Emeria, Shattered Skyclave 1 Hour of Reckoning 1 Makindi Stampede // Makindi Mesas Enchantments (8) 1 Anointed Procession 1 Felidar Retreat 1 Flickerform 1 Intangible Virtue 1 Journey to Nowhere 1 Oblivion Ring 1 Teleportation Circle 1 Valor in Akros Artifacts (9) 1 Arcane Signet 1 Conjurer's Closet 1 Heraldic Banner 1 Marble Diamond 1 Mind Stone 1 Oketra's Monument 1 Panharmonicon 1 Skullclamp 1 Sol Ring Truthfully, I'm generally used to seeing my Blink Commander decks being either Bant or Azorius colors more than anything

Legend Maker, Neo Genesis Unlimited) barely separate by weight, so we sell those unweighed
You dont try and shoot down every big play as it happens, you have to smother them and freeze them before they ever get off the ground
There will be spots where you just take whichever pile has more cards and call it a day - but sometimes you won't