Ultimately, both formats have been very fun to play and very skill-testing (save for a few games that end on the spot due to certain Vow bombs)
For one white mana (the color of heroes in this set), Zack Fair has a base of 0/1 but enters with a +1/+1 counter
Hopefully, these decks will help you tighten up your Sapphire/Steel starter deck and start thinking about new ways to construct your own versions too
For example, if The Spot, Living Portal's enters-the-battlefield ability is copied and four cards are exiled, they all return when The Spot, Living Portal dies
Next is a land and an artifact, but which ones
Though Formidable Speaker doesn't have the ceiling to define a format, most formats have embraced it