Null Chamber Leaning into politics, with Null Chamber you name a problem card, an opponent names a second, and suddenly two key tools are shut off until the Chamber is removed
Sephara, Sky's Blade is a massive payoff when you control the only fliers
You can't choose multiple creature types, such as "Lizard Wizard." Card types such as artifact can't be chosen, nor can subtypes that aren't creature types, such as Jace, Vehicle, or Treasure
Decks that were already strong could now beat you in a whole range of new ways without ever having to tap out for more than a three mana-creature, and once that creature was on the table it felt like it both dramatically slowed your ability to attack and made the situation worse on a continual basis as every turn that went by meant another card (or often cards) available to the opponent to make Dr
Lastly, the deck also runs copies of [c]Bedlam Reveler[/c]
Legendary creatures you control gain protection from each of that creature's colors until end of turn