Now that Lightning is no longer available from Tataru, it has become almost impossible to get the Lightning card since it is strictly tied to Triple Triad tournaments.

Getting the top ranking in a tournament that has the card is impossible due to win trading that is not being addressed. And even getting enough points for Platinum packs seems very unlikely, and even if you do it is an incredibly small number of packs on top of being more RNG whether or not you even get the card.

Even if the RNG of getting the card from Tataru was bad (I never managed to get it in countless matches), at least you know EVENTUALLY you'll get it and the option is always available within whatever limited time they put up for the NPC.