Mainboard (60)
Creatures (15)
Instants (11)
Sorceries (4)
Artifacts (29)
Enchantments (1)
Mono Red Madness is a burn-heavy aggro deck that wins through direct damage from Guttersnipe, Kessig Flamebreather, and a stream of cheap spells triggering them repeatedly. Hydroblast and Blue Elemental Blast are your best answers — they counter or destroy key threats and spells for a single blue mana while protecting your life total. Your artifact-dense shell and Refurbished Familiar provide enough life gain to stabilize, but you need to be aggressive about countering Guttersnipe before it snowballs. Krark-Clan Shaman in your main is already well-positioned here since it can sacrifice artifacts to deal 1 to all creatures, clearing out Guttersnipe and Kessig Flamebreather. Blood Fountain and Toxin Analysis are too slow in this race, and Makeshift Munitions and Sewer-veillance Cam are win-more cards that don't address the immediate pressure.
Dimir Terror is a tempo-control deck that wins by countering your threats and closing with efficient blue and black creatures like Tolarian Terror, Sneaky Snacker, and Gurmag Angler. Bring in the full suite of Pyroblasts and Hydroblasts along with Blue Elemental Blasts to answer their threats and blank their Counterspells — these also stop Brainstorm from filtering their draws. Negate comes in to protect your key spells through their disruption. Krark-Clan Shaman, Makeshift Munitions, and Blood Fountain are lower-impact here since the opponent isn't going wide or gaining life in ways those punish, and Toxin Analysis is too slow when you need to present threats quickly. Focus on deploying Myr Enforcer and Utrom Monitor early through your artifact lands and using Galvanic Blast to keep their early threats in check while your counterspell suite fights over the mid-game.
This is a mirror match where both players are running near-identical 75s, so the sideboard battle is almost entirely about the blue and red blasts. Bring in all seven blast effects — Pyroblast and Blue Elemental Blast — to counter or destroy opposing Thoughtcasts and Myr Enforcers, as those are the cards that pull ahead in the grind. The extra Krark-Clan Shaman gives you a second copy to threaten your opponent's artifact tokens and small creatures while also being a Pyroblast target yourself that demands an answer. Cut the slower value pieces like Toxin Analysis, Blood Fountain, and Sewer-veillance Cam since this matchup is decided by tempo and card advantage denial rather than incremental life and card draw. Galvanic Blast remains in because it kills Refurbished Familiar and Utrom Monitor efficiently, which are the primary threats that stick around after a contested board.