Jund Artifact Sacrifice wants to go wide with cheap bodies (Voldaren Epicure, Greedy Freebooter) and convert them into damage via Oni-Cult Anvil and Shrapnel Blast, so efficient removal for their 1-3 toughness creatures is valuable. Firebending Lesson and Combustion Technique answer Biotech Specialist and The Sackville-Bagginses cleanly, with Combustion Technique's exile clause denying additional sacrifice value. Octopus Form protects your own key threat from their removal or a racing attack. Quantum Riddler is too slow against their explosive artifact starts, and the extra Voldaren Thrillseeker is replaceable with cheaper interaction.