Includes Pokmon TCG: Sword & ShieldAstral Radiance booster pack
For Boom, it requires you to target a land you control to be destroyed - however, indestructible lands can be targeted, so it sticks around while an opponent loses one of theirs
You can use that Item Card to attach up to two Energy cards of different types and attach them to your Pokemon in any way you like freely - as long as you have 7 or more cards in your Lost Zone
A poker-size card wont fit properly in a bridge-size deck box, and vice versa
Of course, by now many copies of these cards are up for sale
Multiple players would have removal in response, playing Qasali Pridemage or Krosan Grip, and youd struggle to hit a critical mass of Equipment in a deck to always have one to copy, owing to the rest of the deck needing a lot more ramp and draw to function