Almost entirely because of duplicate protection, they have now 100% lured me in as a customer to start seriously playing on MTG Arena and spending money, while also still collecting Common, Uncommon, Rare sets on MTGO (though no longer Mythics, it's too expensive to keep that up)
SAFEGUARD YOUR COLLECTION: Holding up to 252 cards, this portfolio allows you peruse your cards quickly and easily while keeping everything organized
Fountainport Fountainport is a pretty decent utility land with an ability that reminds me of Trading Post
#4 Atraxa, Praetors Voice (Multiverse Legends) March Of The Machine: Multiverse Legends Market Price: $10.29 Atraxa, Praetors Voice is the most popular Commander on EDHREC, with over 21,000 decklists
Energy counters were introduced in the Kaladesh block, and featured heavily in the eponymous set and its follow-up, Aether Revolt