Mainboard (60)
Creatures (4)
Instants (4)
Sorceries (1)
Enchantments (29)
Goblins is a fast aggro deck that aims to overwhelm you with Goblin Lackey and Goblin Warchief before your engine comes online — your primary goal is to survive long enough to establish Solitary Confinement, which locks them out of attacking entirely. Parallax Wave is your best early answer, able to exile multiple attackers and buy crucial turns; prioritize finding it alongside your draw engines. Swords to Plowshares handles anything Parallax Wave can't deal with cleanly, especially Goblin Sharpshooter, which can ping your Argothian Enchantresses in response to triggers. Aura of Silence comes in as additional disruption that taxes their Goblin Tinkerer and any artifact or enchantment they bring in from their sideboard, including Tormod's Crypt; the extra Solitary Confinement copy improves your odds of finding the lock piece you need. Watch out for Wasteland and Rishadan Port targeting Serra's Sanctum — keep fetching basic lands to protect your white mana sources for Opalescence and Parallax Wave.
This matchup is defined by their dense countermagic package — Counterspell, Daze, Foil, and Gush mean resolving key enchantments requires forcing them off mana first. Xantid Swarm is your most important sideboard card: attacking into their open board forces them to tap out before your main phase, leaving them unable to counter your Enchantress's Presence or Sterling Grove. Abeyance further protects a pivotal turn by preventing them from casting instants and sorceries while you develop your board. Parallax Wave and Swords to Plowshares are your primary answers to Phyrexian Dreadnought — prioritize resolving one of these early under Swarm coverage, as a 12/12 trampler closes the game before your engine can stabilize. We trim Replenish because it is a sorcery that is trivially countered before you have meaningful enchantments in the graveyard, and Aura of Silence comes in to tax and answer their Powder Keg, which is their best tool for breaking up an established enchantment board.
Mono-Black Midrange attacks on two axes: hand disruption through Duress, Cabal Therapy, and Hypnotic Specter, and targeted removal via Smother and Diabolic Edict. Your primary goal is to establish Solitary Confinement backed by active enchantress draw engines so you can sustain its upkeep cost indefinitely, which simultaneously shuts off their discard and makes you immune to creature damage. Sacred Ground protects Serra's Sanctum and your other lands from Wasteland, which is the biggest threat to your mana development. Replenish is trimmed because Withered Wretch in their mainboard will exile your graveyard proactively, making recursion unreliable. Post-board, watch for Dystopia — which destroys one of your green or white enchantments each upkeep — and Gloom; Aura of Silence taxes their sideboard enchantments and can be sacrificed to destroy a resolved Dystopia or Gloom at a critical moment, and Karmic Justice punishes Wasteland activations and Smother by converting their removal into free destroy effects of your own.