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
Great service, selection and value
3 Selphie (Final Fantasy 8) The Party's Second Leader Selphie is one of the only characters in Final Fantasy 8 who leads a party outside of the main protagonist, Squall
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
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)
What makes Thalia so good is that it taxes all players in the game, forcing them to pay an extra one generic mana to cast their noncreature spells