English cards have a black or dark gray layer sandwiched between the front and back surfaces
Once you have these cards, you're also free to customize your deck as you see fit though you need to have a minimum of 40 and maximum of 60 cards per deck, not accounting for any extra cards like Fusion or Xyz monsters
Although the Frenzy version is better against Rakdos Midrange thanks to its ability to grind better with its expensive cards, these same cards actually pose a big liability against Izzet Phoenix
Runehorn Hellkite also looks really interesting, and if I recall correctly, some people here already use(d) it in their cubes
Helps protect against scratches, dust, and fingerprints during storage, shipping, grading, and everyday use