how are sports cards graded Grading Baseball cards, and Magazines Grading Scale | Sports Card

The K Series cards appended a capital letter "K" to their set position number, e.g

As for what makes this set in particular special, it adds four more Mega Evolution Pokemon ex, nine Pokemon ex, a handful of illustration/special illustration rare cards, and 18 ultra rare Trainer Pokemon cards

They also seem to get products a day or so ahead of release, meaning you might get this rare set before all of your friends

Higher Flair levels require more Shinedust and more card copies

4 Aragorn, Hornburg Hero No One Will Take It Naya commanders have a history of working with +1/+1 counters and Aragorn, Hornburg Hero might be one of the best