>>96342391
It's like..
>0 - 1 Secret Rare per box (If you don't get a SEC, you'll get another AA)
>2 - 3 Alternate Art per box (2 AA by default, 3 if you don't get a sec). AAs can be C, U, R, SR, or SEC, and it's entirely possible to get TWO secret rares per box because of this
>Like, 6 SRs?
>EX Boxes can also have hard-color borders, called 'limited foils'
Most decks will usually have a few playsets of SRs, so you're probably going to need to buy singles. That being said, it's usually cheaper to just buy singles if you're building a particular deck, unless you get godly pulls that make up for the cost of a box.