Mono-White Aggro has very few artifacts (only Clue tokens from Novice Inspector/Thraben Inspector), so Steel Sabotage's artifact modes are marginal — bring it in only as a minor way to bounce a Clue to deny a card, but the real plan is pure tempo racing. This is a tough aggro matchup, so prioritize Counterspell and Dispel on their key threats like Leonardo, Big Brother or Search Party Captain, and resolve Delver of Secrets early as a blocker/clock. We cut Deem Inferior since it is far too slow against a deck that curves out efficient creatures every turn. Keep Mental Note and Thought Scour at full count since speed in assembling Tolarian Terror is critical to stabilize before their board overwhelms us.