MDFCs allow you to increase your land count without compromising your spell count

3 Bladewing the Risen Bladewing, Deathless Tyrant Blazing Specter Blim, Comedic Genius Boltwing Marauder Chaos, the Endless Defiler of Souls Demigod of Revenge Dragonlord Kolaghan Falkenrath Aristocrat Green Goblin, Nemesis Green Goblin, Revenant Immersturm Predator Interceptor Mechan Kathari Bomber Kolaghan, the Storm's Fury Kulrath Knight Malfegor Nu and Sumi, Career Criminals Ob Nixilis, Captive Kingpin Olivia Voldaren Olivia, Crimson Bride Olivia, Mobilized for War Orcus, Prince of Undeath Ozai, the Phoenix King Rakdos the Defiler Rakdos, Lord of Riots Rakdos, Patron of Chaos Rakdos, the Muscle Rakdos, the Showstopper Rankle and Torbran Raphael, Fiendish Savior Rohgahh, Kher Keep Overlord Sarkhan the Mad Setzer, Wandering Gambler Strefan, Maurer Progenitor Swift Warkite Syrix, Carrier of the Flame Valgavoth, Harrower of Souls Vampiric Dragon Wake the Dragon Witch-king, Sky Scourge Zagras, Thief of Heartbeats
Double-faced cards proved to have a lot of design space
Mono-coloured cards that fit into two Colleges split their points equally between Colleges
Graha Tia, Scion Reborn Final Fantasy XIV G'raha Tia, Scion Reborn appears to be the backup commander for Y'shtola, Night's Blessed (the cat ears are a dead giveaway)
Leyline of the Law The Leyline Cycle is likely your first introduction to pregame effects