Rest in Peace, Containment Priest, Relic of Progenitus, Nihil Spellbomb, and their ilk will shut you down hard, so keeping at least 1 piece of spot removal for these on hand should be a priority
1 editions cards are the rarest and most valuable among the standard Pokmon cards
Fury The other part of the Rakdos Scam decks, Fury was hit by the ban hammer in Modern after it was felt like that deck was a little too much
There is also a lot of discourse surrounding how OP MTG 's Badgermole Cub is in Standard, to the point that some players are preemptively calling for a ban ahead of tournaments
Movie Poster Emrakul in foil will be an impressively expensive card, but that same slot might get you a showcase Arilinn Kord for $5
Personally, I use orange-hue Katana sleeves with a wavelength of around 600 nm, giving my 60-card deck a polished 10/10 look and feel