I think the one thing I would've liked to see more of in the list are summon cards: if you look at our commander options, Tidus, Yuna's Guardian and Yuna, Grand Summoner, both clearly work exceptionally well with the new summon creatures like Summon: Valefor as Tidus can remove lore counters to keep them around longer and Yuna can pump up creatures when the summons die, and that's a unique new game design space that would differentiate the deck from more generic +1/+1 Counter lists out there
What those natural philosophers called natural magic included what we now call biology, zoology, mineralogy, botany, and even philology
Unfortunately, these are going to be quite difficult to get
Runners-up: Nissa, Vastwood Seer is cheap to cast, easy to flip, and all of her abilities are great/relevant in multiplayer
[/spoiler] [spoiler='Warrior Lady'] You can Normal Summon this card with out a tribute, but it's original ATK and DEF are switched