Hm, I think the Starter Pack was 5 cards for 1000 DEC, so 200 DEC per BCX. That's only Rare and Common. Rebellion had 28 Commons (11,200 BCX) and 29 Rare (3,335 BCX), so let's say it's similar and with a lot of luck you "only" need 15k BCX to get those maxed out - that would be a wooping 3 million DEC, so 2,250$. And that is just using the starter packs... That's why I always loved Chaos Legion, it's so cheap and the best starter edition so far, but nobody listens to me (for good reason and with many good arguments, just whining here because I want CL to stay relevant :-D )