They come in pokemon cards packs , booster boxes , ETBs , decks, collection boxes an much more
If Vault 87 leaves the battlefield before its first chapter ability resolves, you won't gain control of the target creature at all
This argument falls apart once you move into cards that are only slightly less interesting
I thought it was nice at the time that it had some of the neat cards from earlier sets in it, but it really did feel like just another reprint at the time
Its plenty viable for a few of the Unfinity commanders like The Most Dangerous Gamer, and you could do worse than sticking it into your Mr
For example, a random unpopular Pokmon that gets a gold card is not going to be worth anywhere near how much a Charizard gold card would be worth