This is because, unlike the packs you'll select afterwards, the cards you get from your very first booster pack are set depending on your choice between Charizard, Pikachu or Mewtwo
Thunder Flip a coin
The decks cover key characters and events from Final Fantasy VI, VII, X, and XIV , though the main set also makes references to these games
A tasty bonus is that this card triggers on your combat step not upkeep, which means you get some value immediately and are less likely to suffer a blowout
The new version is much weaker, and I dont think it will continue to prosper given those changes, but it certainly made its mark on 2021
This artifact has a fun story attached to it, too: Originally, Skullclamp was designed to give a +1/+1 buff, but before seeing print the Magic designers thought that such a buff would make Skullclamp too powerful and they changed it to +1/-1