At the cost of three, he is fairly playable and has a high defense of four for when he is challenged
Gateway has an incredibly approachable price point and the most gentle onramp to the complexities of this game style that I have ever seen
As for the best of the new creatures, O'aka, Traveling Merchant turns your excess counters into carddraw, and Maester Seymour grows creatures of your choice as you grow him
30% of Play boosters (but, interestingly, not Collector boosters) have Art cards, and 5% of Play boosters have art cards with a gold-stamped artist signature or Planeswalker symbol
Its quite easy to make modified creatures with mechanics like job select and living weapon that create tokens to attach equipment to, not to mention whites plethora of counter production
In the past two weeks, this entire list has already shifted, removing Cinderella from the list completely