Mainboard (60)
Goblins is a fast aggro matchup where Goblin Lackey and Goblin Warchief provide explosive starts, but your 12/12 trampling Dreadnought is nearly impossible for them to remove — Gempalm Incinerator's cycling damage won't reach 12 without a massive board, and outside of Goblin Tinkerer destroying your artifacts, they lack efficient answers to it. Hydroblast and Blue Elemental Blast come in as instant-speed removal for red creatures like Goblin Lackey and Mogg Fanatic, and double as counterspells for the Pyroblasts and Red Elemental Blasts they'll bring in to fight your blue countermagic. The artifact Tsabo's Web neutralizes Rishadan Port and Wasteland — their primary tools for disrupting your mana and preventing you from leaving up Counterspell mana at key moments. Peek and Flash of Insight are too slow for this race; prioritize countering Goblin Lackey on turn one and Goblin Warchief above almost everything else, since either resolving unchecked snowballs the game faster than you can recover.
This mirror match comes down to who resolves a Phyrexian Dreadnought first and protects it — both decks have identical threat density and nearly identical countermagic. Essence Flare is your primary weapon: enchanting their Dreadnought converts it into a liability that kills itself in their upkeep, making it a must-counter threat that often trades up on tempo. Brain Freeze comes in as a late-game threat since both decks generate significant storm count through Gush and Portent loops, giving you an alternate path to victory in long stalls. Daze is weakest here because both players will be aware of it and can play around it easily in a late-game mana-rich mirror, and Powder Keg is too slow and symmetrical to matter. Peek comes out to make room since the information is less valuable when you already know their deck list and the game is decided by speed and countermagic sequencing.
Mono-Black Midrange attacks on two axes: their discard suite (Duress, Cabal Therapy, Hypnotic Specter) strips your combo pieces before you can deploy them, while Chainer's Edict and Diabolic Edict threaten to sacrifice a resolved Dreadnought that your counters can't protect. Post-board, Dystopia is their most dangerous card—it forces you to sacrifice a blue or green permanent every upkeep, quickly dismantling your board—so Annul is the highest-priority counter, and also handles Engineered Plague if they name Dreadnought. Blue Elemental Blast and Hydroblast pull double duty as hard answers to resolved threats like Hypnotic Specter and Nantuko Shade, as well as stack interaction against their key black spells. Essence Flare is efficient removal that kills any creature it enchants within a turn cycle; slap it on a Hypnotic Specter to neutralize the discard engine immediately. Daze and Thwart come out because their Island-pitching cost is a serious liability when Wasteland is in play, and Peek's information is outclassed by the urgent need for interaction.