Caw Gates is a grindy white-red Gates deck with resilient threats like Sacred Cat and removal-resistant enchantments like Journey to Nowhere, so Extract a Confession is valuable as unconditional sacrifice-based removal that dodges their combat tricks like Prismatic Strands. Nihil Spellbomb provides incidental graveyard disruption against their Malevolent Rumble and Pursue the Past value engines. Toxin Analysis is low-impact against a deck built around lifegain and blockers, and one Cast Down is enough removal to keep given their resilient board, so these are trimmed for the added sacrifice effects.