“Grixis Affinity is a tempo-combo deck that leverages free or cheap artifacts — particularly artifact lands and cyclers like Ichor Wellspring — to rapidly reduce the cost of Myr Enforcer and Refurbished Familiar to zero mana, flooding the board with large threats ahead of curve. Thoughtcast and Reckoner's Bargain provide card velocity to chain resources together, while Galvanic Blast serves as both removal and a finisher, easily achieving metalcraft for four damage. The deck wins by overwhelming opponents with cheap, efficient threats backed by strong card draw and burn before fair decks can establish their gameplan.”
Missing sideboard cards? The full 15-card sideboard runs about $63.45.
Buy sideboard on ManapoolMono Red Madness is an all-red deck, so Hydroblast can counter or destroy key pieces like Kessig Flamebreather, Guttersnipe, Fiery Temper, or Lightning Bolt, disrupting their damage engine cheaply. Cast into the Fire deals 1 damage to two of their low-toughness creatures (Voldaren Epicure at 1 toughness, Kessig Flamebreather and Guttersnipe at higher toughness so it won't kill those) or exiles a problematic artifact. Krark-Clan Shaman is symmetrical and too slow against this fast clock, and Toxin Analysis's combat trick barely matters, so both are cut for more efficient red-hate. Race hard with our low curve and use Galvanic Blast/Hydroblast to stop the burn before it adds up.
Mono-Blue Terror is entirely blue, so Pyroblast can counter or destroy Tolarian Terror, Cryptic Serpent, Delver of Secrets, or Counterspell itself, disrupting their graveyard-fueled threats and permission. Envelop counters their key sorceries like Lorien Revealed or Ponder, cutting off card selection that fuels their graveyard plan. Krark-Clan Shaman underperforms against their large, resilient serpents, and Toxin Analysis's combat trick rarely matters against a tempo-control deck, so both are trimmed. Stay aggressive and use these blasts to protect our clock from their counterspells.
Tron assembles Urza's Tower/Mine/Power Plant for big mana and casts large threats like Bramble Wurm and Nyxborn Hydra; we need to race before they hit their lands or punish their single big threats. Extract a Confession forces them to sacrifice a creature, which can strip an early Nyxborn Hydra or Bramble Wurm before it stabilizes the board. The extra Nihil Spellbomb offers a cheap cycling piece and some graveyard disruption. Cast Down and Toxin Analysis are fine but redundant removal is less valuable than proactive plays since Tron's early game is passive; prioritize speed and use Galvanic Blast on early blockers.