Conclusion By printing your own proxy cards you can gain access to cards you dont currently own, playtest your deck build and most importantly preserve your high value cards in friendly matches
While not a must-have, deck boxes still feel reasonably necessary for cards to be in
This triggers "Miracle 2" again, which does add to the ability's usefulness, but unless you're top-decking instants, you're just going to be cycling cards during your opponent's turn in hopes of having a stacked hand when your next turn starts
Lower numbers are generally more exciting, but if you open the biggest number in a run (like a 500/500), thats usually worth more than a middling number, too
What pushes Planning above and beyond such things is the current strength of delve, delirium and other graveyard based mechanisms
Higher rarities, such as Hyper Rare, are marked with variants of these symbols