If youre looking to open up some dinosaurs in packs, your best bet would be one of the Ixalan sets
We call its coming the Season of Salt, when our fields and friends are transfigured into salt pillars
Players will be able to enter any card codes they get with physical decks into the game after it fully launches in order to unlock sets to use in-game
Switch, Great Ball, Pokmon Catcher, and one or two other trainer cards are still legal because they have been reprinted with F, G, or H regulation marks, so even though you are not playing the new version of the card, it has the same effect as the old one, so old editions of standard legal cards are legal for the standard format
Firstly, discarding the card is what counts as the triggered ability putting the card on the stack and allowing opponents to respond
Of course, this effect only triggers once a turn, but you can put it to good use