Of course this depends on your audience, but some of the guys I trade with wouldnt even know what I meant if I told them, here are my Type 2 cards, heres the Extended section, and behind that is Legacy, and if I have any Vintage-only stuff, its in the back. If they want some random Green fatty they might not have seen before to fill out their casual or EDH deck, then you create some extra work when they have to search through three sections of Green cards, or more if you dont have it organized by color
Another must-have is Bloodmoon Ursaluna ex (216/167), a powerhouse card that can attack for 240 damage with virtually no setup, making it a serious threat in the current meta
Combine Magistrate with cards like Uba Mask and Possibility Storm and your opponents can no longer play any of their cards
Thats before considering the recursive power or pairing this with Doubling Season effects
In the past, the main concern was random, expensive, old Reserved List cards, which are comparatively easy to counterfeit
Zendikar Rising Set Booster Box $179.99 US Shipping Only Due to export restrictions, this item may only be shipped to addresses in the United States, APO/FPO addresses, and Puerto Rico