4c Artifacts leans heavily on artifact synergies (Simulacrum Synthesizer, Candy Trail, Spring-Loaded Sawblades) and sweepers like Day of Judgment, so Curious Farm Animals' sacrifice ability can destroy a key artifact piece while also gaining 3 life on death to keep your lifegain triggers flowing. Duress strips their sweeper or removal before it resolves, which is crucial since Day of Judgment and Perilous Snare can blow you out. Liliana the Faultless and Enlightened Confidant are fragile 1-toughness bodies that die to their artifact-based removal and don't contribute enough against a grindy value deck. Prioritize disrupting their engine pieces while rebuilding your board after any sweeper.