Circu, Dimir Lobotomist Dimir Aqueduct Dimir Charm Dimir Cluestone Dimir Cutpurse Dimir Doppelganger Dimir Guildgate Dimir Guildmage Dimir House Guard Dimir Infiltrator Dimir Informant Dimir Keyrune Dimir Locket Dimir Machinations Dimir Signet Dimir Spybug Dimir Strandcatcher Lazav, Dimir Mastermind Vladimir and Godfrey
And those ally fetch lands
But for those looking for condensed advice: the ingredients of truly fierce competitive decks are infinite combo pieces, tutors to find them quickly, resource acceleration (mana rocks) to cast all those cards faster, and cheap interaction to stop opposing combos developing
Thats because trampling over with big numbers is part and parcel of being in green, and because generally green has plenty of redundant effects and redundant win conditions, so the support cards are way more important
Collectors dont chase it like they would rare Pokmon cards, but multiple prints (with different Professors on the artwork) make it a fun card to track across expansions