Jund Wildfire's engine is built entirely on sacrificing artifacts like Ichor Wellspring and Fanatical Offering to chain card advantage, so Duress proactively strips their key noncreature spells (Cleansing Wildfire, Fanatical Offering, Cast Down) before the loop starts. Troublemaker Ouphe can bargain a token away to exile a nonland artifact — a fresh Ichor Wellspring or Nihil Spellbomb before it can be sacrificed for value, or a key enchantment like Makeshift Munitions. Pestilence is risky since larger threats like Writhing Chrysalis can outlast a slow activation clock, and Lembas is replaced since card selection is less urgent than disruption in a grindy mirror-ish matchup.