Bird is a type with lots of access to tokens, whether its Battle Screech or Murmuring Mystic
Split cards, by definition, can only be instants or sorceries as the rules don't want half a split card on the battlefield
If the Artifact looks like a book and feels like a book, why not call it a "Book" in the official rules
While not great for a blue deck, this effect shines when combined with the aforementioned Bridge in red decks with few creatures draw burn every turn, and keep your opponent from attacking you
They kicked things off with a solid suite of suggestions, including Tons of interesting creatures with well-defined abilities (and a lot of transforming creatures because of how many characters are secretly other characters). On top of this, theres also An opportunity for a lot of battle cards because the world is littered with old battlegrounds. They also discussed the potential for Spirit Summon Companions, and color alignments for each in-game faction