Engineered Plague chosen for Goblin shuts down their entire tribal synergy suite (Goblin Piledriver, Goblin Warchief, Goblin Ringleader, token Goblins from Siege-Gang Commander) by giving them all -1/-1, killing the 1-toughness Mogg Fanatic and Goblin tokens outright. Infest sweeps their small creatures (mostly 1/1s and 2/2s) for -2/-2 without hurting your bigger threats as much. Phyrexian Furnace is weak here since this Goblin build has no meaningful graveyard recursion to disrupt. Wrath of God and Bane of the Living remain excellent since this is a low-toughness aggro swarm deck that folds to sweepers.

Aura of Silence is critical, taxing Opalescence, Parallax Wave, and Attunement while providing a way to destroy any enchantment that resolves, directly attacking their entire game plan. Bane of the Living is largely dead since this deck fields almost no creatures worth sweeping, so trim it for proactive answers. Duress should be used aggressively pre-combo to strip Replenish or Opalescence, while Vindicate destroys key permanents before they can combo off.

Aura of Silence lets you destroy Sylvan Library or other key enchantments while taxing their spells, and is a strong catch-all include even though their deck is creature-light. Sacred Ground is a direct answer to their Armageddon plan, returning your lands to the battlefield after they blow up the board and letting you rebuild faster than they can. Bane of the Living gets trimmed since Terravore and Call of the Herd tokens are the only real creatures to sweep and their curve is otherwise land-based. Keep Vindicate and Swords to Plowshares as flexible answers to Terravore, Treetop Village, or Weathered Wayfarer, and watch out for Wasteland/Rishadan Port pressuring your mana.