Rakdos Sacrifice grinds with small, resilient value creatures like Cauldron Familiar, Eyetwitch, and Mayhem Devil, so extra cheap removal that can pick off multiple small bodies is valuable. Iroh's Demonstration's 1-damage mode sweeps their 1-toughness Eyetwitch and Cauldron Familiar tokens while its 4-damage mode kills Mayhem Devil or Bloodtithe Harvester, and Combustion Technique scales up as the game goes long to answer bigger threats. Firebending Lesson gives another flexible removal spell that can be kicked later to kill Fable of the Mirror-Breaker's token copies. Quantum Riddler and Wild Ride are too slow against their proactive sacrifice engine, and trimming a Boomerang Basics keeps the curve focused on interaction.