You have early drops that grow big, like Werebear and Nimble Mongoose
Great service, selection and value
It falls to the eight spot on my list, but it's still here
Lurrus specifically and companions in general almost immediately broke the game, dominating quite literally every format in existence until Wizards was forced to take the unprecedented step of errata'ing the entire mechanic by essentially adding a three-mana tax to companions
It doesn't matter whether you have 0 or less life, you're forced to draw a card while your library is empty, you have ten or more poison counters, you're at the end of your Nine Lives, your opponent is a Triskaidekaphile, or so on
This keeps the format fresh and interesting, but also means youll need to keep updating your collection