Golgari Gardens leans on artifact synergies (Ichor Wellspring, Fanatical Offering, Nihil Spellbomb, Tithing Blade) alongside efficient black removal like Cast Down, so Dust to Dust exiling two artifacts at a time disrupts their sacrifice and card draw loops significantly. Last Breath exiles small threats such as Crypt Rats or Accursed Marauder (both power 2 or less) before they can trigger their abilities, gaining 4 life against their grindy removal-heavy plan. Prismatic Strands is weak since this isn't a burn race and colored damage prevention rarely comes up against their black removal suite, while Ephemerate has fewer profitable interactions against a deck that answers our creatures with hard removal, so both are trimmed for artifact hate and efficient exile-based removal.