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.

Izzet Prowess wants to curve cheap spells into Cori-Steel Cutter tokens and burn you out, so Consign to Memory is excellent, countering their colorless Mishra's Bauble and any triggered abilities like Dragon's Rage Channeler surveil while Mystical Dispute cheaply stops their blue cantrips like Preordain and Expressive Iteration. Rest in Peace shuts off Lava Dart flashback and any graveyard shenanigans while incidentally hosing their sideboarded Tormod's Crypt plans. Cut the slower Prismatic Ending and clunky Tune the Narrative along with a Counterspell since tempo matters more than card quality against a low curve aggro deck. Wrath of the Skies and Solitude remain crucial to reset their board of small creatures.

This is a grindy value mirror full of Ephemerate/Flickerwisp blink loops and card advantage engines like Orcish Bowmasters and Overlord of the Balemurk, so High Noon is huge, slowing down their ability to chain Thoughtseize into blink shenanigans in the same turn. Celestial Purge answers their black threats like Emperor of Bones or Overlord of the Balemurk outright with exile, dodging any blink or recursion. Bribery is a strong finisher that steals their best creature, likely Atraxa, Grand Unifier or Griselbrand-adjacent threats if applicable, though here it grabs Atraxa or Quantum Riddler. Spell Snare is weak since few of their key cards cost exactly 2, and Isochron Scepter is too slow against their disruption-heavy hand attacks.