Board Thread:General Discussion/@comment-5896727-20130110130007/@comment-5896727-20130111185140

I'll keep in mind what you said, but to be honest as far as I've seen it, I do not think that there is such a system, because I don't think they thought this through as much as TCG back in the day.

Additionally I have to correct you on one thing: Level 4 Rarity is 0.08% -> ~0.01%

So I guess its meant to be 1 of thousand cards, which is really pretty rare and I feel really lucky, that I got 2 R4's.