Jund Wildfire relies heavily on artifacts like Ichor Wellspring and Lembas to chain card advantage, so Duress can strip a key enabler like Cleansing Wildfire before it resolves. Cast into the Fire can exile an Ichor Wellspring or other cheap artifact to deny their card-draw triggers, or pick off a small creature like Gixian Infiltrator before it grows. Alms of the Vein and Highway Robbery are too slow against a grindy value deck that will out-resource you if you don't apply proactive pressure and disruption. Keep your core burn suite intact to close games quickly before their artifact engine snowballs.