Black Bolt contains 7 SAR (Special Art Rare) cards: Zekrom ex, Ns Plan, Kyurem ex, Meloetta ex, Genesect ex, Serperior ex, and Excadrill ex
The Beta set corrected printing errors from Alpha and re-introduced black-bordered cards with new corners, enhancing the aesthetic appeal
For reference, when I calculated it in the past, the opening consistency for Brave Virtual World was 88% if you count just the Brave engine as an opening, and about 80% if you only count cases where you can also perform a Virtual World combo
Each sealedJapaneseRuler of the Black Flame Booster Box contains 30 booster packs of 5 random cards each
Virtue of Strength doesn't produce any mana itself