Grixis Affinity is a fast artifact-combo deck that generates card advantage through Ichor Wellspring, Reckoner's Bargain, and Thoughtcast before closing with Myr Enforcer beats or Galvanic Blast. Post-board, destroying their artifact base is the priority: Deglamer hits any artifact or enchantment at instant speed, while Dust to Dust removes two artifacts at once, dismantling their mana-reducing lands and card-draw pieces to cripple their velocity. Faerie Macabre can be discarded from hand for free to exile Blood Fountain and any other graveyard fuel, cutting off their recursion loop without needing black mana. Guardian of the Guildpact is your best threat in this matchup since it dodges Galvanic Blast (mono-red) and nearly all their targeted removal; an Armadillo Cloak on it creates a lifelink engine they cannot answer cleanly. Retain Prismatic Strands to blunt Krark-Clan Shaman activations mid-combat and protect your board while you develop your gate package.