This Gruul deck's engine leans on colorless spells and abilities, making Consign to Memory extremely effective at countering their colorless threats like Kozilek's Command and Basking Broodscale, as well as stopping key triggered abilities like Broodscale's counter trigger or Devourer of Destiny's cast trigger—though note that green spells like Malevolent Rumble and Ancient Stirrings cannot be targeted. Rest in Peace is crucial here because exiling cards instead of sending them to the graveyard prevents Eldrazi Spawn sacrifices from triggering Blade of the Bloodchief, completely shutting down their infinite combo. Supreme Verdict gives us an extra uncounterable sweeper, while Kaheera can come in as an extra 3/2 body that pumps Solitude, which qualifies as an Elemental. Cut slow card selection spells and situational removal like Prismatic Ending that can't handle giant threats like Devourer of Destiny and Emrakul, the Promised End due to their high mana values.