Golgari Gardens is loaded with black removal like Cast Down, Snuff Out, Defile, and Unmake, all of which can be neutralized on one creature by Mask of Law and Grace's protection from black. We keep our core threats and enchantment suite intact since resolving hexproof creatures is still our best line against their removal-heavy but slow-clocking deck; Cartouche is cut for being the least impactful Aura here.