Vintage sets (Base Set, Jungle, Fossil, Team Rocket) from 1999-2000 are highly collectible
The anywhere other than the battlefield clause prevents people from just winning the game with Blood Artist, a Viscera Seer, and some poor Terravore that would be killed and resurrected more often than Duncan Idaho in the Dune series (spoilers)
Zack Fair is a great 1-drop for aggressive decks in particular
Best Green/Blue Commons in Wilds of Eldraine limited : Vantress Transmuter, Beanstalk Wurm, Curse of the Werefox, Return from the Wilds, Rootrider Faun Removal is a bit lighter on the ground here so you need to use it with care, though blue provides you with plenty of tricks
In general, players learn three lessons and return for a fourth where they put the ideas together to make sure theyve learned it