Bucky forces discards on opponents whenever the user plays a Floodborn character, and with the Ward ability that blocks challenges, he can be difficult to remove from the board in order to avoid further discards
This dramatically changed the goal of pack openings for collectors and the impact remains today, with both Pokmon GX and Vs continuing the Ultra Rare/Full Art structure these introduced
Mime (Vending) Mewtwo (Evolutions) Lt
Those players put those cards onto the battlefield tapped, then shuffle
Thanks to Curse of the Sea, Jellicent ex shuts down Item and Tool cards while active, giving you time to set up Gardevoir ex
Today, in multiplayer formats such as Commander, stax combos are getting increasingly frequent since you are dealing with 3 or more opponents in one fell swoop, raising the appeal of using the combo