These unlock relatively soon, around level six, and are a way for you to show off cards that you've collected as shown in Austin John Plays' YouTube video
Don't let him know anything
First off, the drop has five cards, which immediately puts it in the conversation for potentially having more value than it costs (although the fact that the drop costs $50 instead of $30 or $40 somewhat complicates the calculation)
Magic players love to learn and to be dazzled by unique spells, but its getting tough for even committed players to keep up
Ill also talk about how good the cards are in general, and where you might see them played
Aside from cards on the Banned List, this category has no deckbuilding restrictions, so you can feel free to build around early-game combos and mass land denial and include as many Game Changers as you want