There are some pretty suspect cards here, including Scroll Rack
As yall know, Im a big fan of small, efficient white creatures that immediately get the ball rolling before the opponent can get their feet off the ground
After youve controlled the game entirely, and if you havent won hard enough, you can activate Jaces final ability to exile an opponents library and force them to turn whatever cards they have in hand into their new library
In short, they make your brand easier to remember, understand, and believe in
There are many applications for this, from gaining extra value from a creature you were planning to remove anyway, to stinging your own creatures before sacrificing them to another effect
Developing Your Eye for Detail If you want to refine your skill, practice looking at as many real MTG cards as you can