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
This simple piece of countermagic looks innocuous enough, but its actually likely the best Standard card in Aetherdrift overall
This keeps the format fresh and interesting, but also means youll need to keep updating your collection
It is so strong that when I try the Selesnya version of the deck I have started to add it as my only Blue card (which is also part of why I have shifted my focus back to Simic)
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 one is a little harder to flip, but her effects are very powerful