it distinguishes between 10 Pristine and 10 Perfect, with the latter requiring flawless subgrades
Like most Magic: The Gathering cards, the value of Darksteel Citadel depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Modern Masters 2015)
Discord, Lord of Disharmony comes with a random effect that can be one of the most powerful abilities in all of MTG
This doesnt affect the value too much, but the illustrator name (aka artist) for each card is usually visible on both old and new cards
I haven't written an article in a while, and until now my articles have mostly been on Magic Online design and the beta client
With the set being released in Japan in just a few weeks we should expect to get a lot more reveals coming up very soon