Honorable Mentions We made it through my top 10 faster than I expected, so Ill throw in a few honorable mentions
By 1994, brands like Donruss together with Leaf Candy Company were implementing similar treatments to their product line
Lands specifically being so simple is a big reduction in mental load, and while there are technically differences between the back (Plain ETB tapped vs ETB tapped unless you pay 3 life), it's not enough that I would (for eg) only run one of those kinds if the front faces both felt right
Then you can -7 as an ultimate to have your foe exile X cards from their library where X is your exiled mana cost, so that's a win-con over time
Any advice for newbies picking up a TCG for the first time
Friend: Alright now I am going to pay one, make it into a creature, and swing at you