Daily Win Reward: Every day players can earn gold or individual card rewards (ICRs) when they win a match (up to 15 wins/reward instances) in any game mode with the exception of Play if you queue with a deck that is non-standard legal, Direct Challenge, and Bot Matches
The Pokemon Company says you'll be able to grab packs from Deluxe Pack ex until October 30th, at which point they'll be removed
If you want more pack-opening action beyond the game's daily limits, platforms like Packz let you open premium packs anytime
Japanese cards also have no non-holo rares and no energy cards in packs
Black has no shortage of tutors now, but this is probably a better one if you have life loss triggers or if you want to chain it with some self-mill
Also, keep in mind there is a watermark symbol on many of the cards that is associated with one of the elements (like Airbending in white.) When building a 40-card sealed deck, you have a very limited pool of cards to choose from