Gruul Basking Broodscale Combo ramps via Ancient Stirrings, Delighted Halfling, and Urza's Saga into Basking Broodscale plus Kozilek's Command loops backed by Blade of the Bloodchief, with Emrakul, the Promised End as a backup finisher. Tormod's Crypt can strip their graveyard to slow down Malevolent Rumble and Kozilek's Command value, and Meltdown answers their artifact mana base like Eldrazi Temple constructs and any Trinisphere or Vexing Bauble they bring in. Mutagenic Growth and Violent Urge don't do enough against a deck assembling a value engine rather than fighting on the stack or in combat, so they're trimmed for disruption that actually slows their engine.

Gruul Basking Broodscale Combo wants to loop Basking Broodscale with Kozilek's Command and Devourer of Destiny off Urza's Saga and Eldrazi Temple ramp, so graveyard and artifact hate matter: Tormod's Crypt and Soul-Guide Lantern disrupt their combo recursion, while Meltdown can blow up their Urza's Saga constructs or Walking Ballista. Spell Pierce taxes their Kozilek's Command or Malevolent Rumble at a key moment. Cut combat tricks since this matchup is a disruption and speed race rather than a fight over combat math — try to close the game before they assemble the Basking Broodscale loop around turn 4-5.

This Gruul deck's core threats are colorless creatures — Devourer of Destiny, Basking Broodscale, and Glaring Fleshraker — making Consign to Memory a clean answer that can even be replicated to counter multiple in one turn. Meltdown, set at X=1, blows up their cheap artifact permanents without touching their nonartifact threats we don't need to hit. Mutagenic Growth and Violent Urge come out since this matchup is decided more by disrupting their ramp and colorless payoffs than by combat tricks, and we need to race before Emrakul, the Promised End or Devourer of Destiny takes over the game. Keep pressure high and use countermagic on their key colorless spells.