WBR brings a wide, aggressive board with cheap creatures like Marauding Mako, Iron-Shield Elf, and Hardened Academic, making Split Up's ability to wipe all tapped or untapped creatures very strong after they commit to an attack. Rest in Peace shuts off Bloodghast's recursive landfall return and denies value from their graveyard-based cards like Hardened Academic and Moonshadow. Erode is a poor fit since it fixes their manabase for free, and Nurturing Pixie and Flitterwing Nuisance are too fragile against their efficient removal and aggressive creatures. Prioritize board wipes and graveyard hate to blunt their recursive aggression plan.