This meant that when most players had a choice of what to buy, they were opting to buy Set Boosters

Angrath, Captain of Chaos Assault on Osgiliath Aven Eternal Barad-dr Bleeding Edge Book of Mazarbul Callous Dismissal Commence the Endgame Corsairs of Umbar Crush Dissent Deceive the Messenger Dreadhorde Invasion Dreadhorde Twins Dunland Crebain Easterling Vanguard Enter the God-Eternals Eternal Skylord Fall of Cair Andros Foray of Orcs Gleaming Overseer Gothmog, Morgul Lieutenant Grim Initiate Grishnkh, Brash Instigator Grma Wormtongue Herald of the Dreadhorde Honor the God-Pharaoh Invade the City Invading Manticore Lazotep Chancellor Lazotep Plating Lazotep Reaver Lazotep Sliver March from the Black Gate Mindless Conscription Mordor Muster Moria Scavenger Orcish Bowmasters Orcish Medicine Relentless Advance Saruman the White Saruman's Trickery Saruman, the White Hand Sauron, Lord of the Rings Sauron, the Dark Lord Shagrat, Loot Bearer Summons of Saruman Surrounded by Orcs Swarming of Moria The Mouth of Sauron The Torment of Gollum Toll of the Invasion Treason of Isengard Vizier of the Scorpion Warbeast of Gorgoroth Warg Rider Widespread Brutality

Honestly, I think theres fun to be had here with all of these decks, so pick the color trio you like best and just roll with it
Apparently, 96% of the cards in the Commander Workshop are Rares and Mythics
Cost reduction isnt usually the best Limited ability, but reducing legendaries by 2 mana is a big enough reduction that Im interested