Jund Artifact Sacrifice depends heavily on artifacts like Oni-Cult Anvil, Springleaf Drum, and Experimental Synthesizer, so Abrade gives you a clean way to destroy their key sacrifice-engine pieces, or to deal 3 damage to a creature like Biotech Specialist when needed. Agatha's Soul Cauldron can exile cards from graveyards, and it gives your creatures with +1/+1 counters the activated abilities of the creature cards it has exiled, which adds some value over a long grindy game. Voldaren Epicure's small body trades poorly into their efficient removal and aggressive curve, and one Torch the Tower is replaceable since their cheap creatures like Greedy Freebooter and Voldaren Epicure die to 2 damage from your remaining Torch the Tower copies. Biotech Specialist is a 1/3 and survives 2 damage, so save Fiery Temper or Abrade for it. Focus on racing their aggression while using Abrade to break up their artifact synergies at key moments.