As for the contents I never watched any being opened and failed to purchase a set of packs 2 years ago, as far as we know there could be Steam Siege cards insidejust kidding, for sure non-holo 1999-2000 cards, the holographic cards are pending confirmation
Six damage/destroy target vehicle is more or less Terminate in this format, as this only misses Agonasaur Rex, Pyrewood Gearhulk, and two of the vanilla legends (one of which is a 0/8)
These secret, rare alternate art cards have been included in every set since Shining Revelry
I currently have these up on our interest list
Japanese Pokmon cards are slightly more durable than their English counterparts, despite being thinner, and this can raise their value to collectors
Like most land-based cards, it works best in green, but any color appreciates a few 2/2s to pressure their opponents and help mitigate mana flooding