Gruul Ponza's clock relies heavily on artifact-based mana acceleration and value like Bonder's Ornament, and Dust to Dust exiles two of these targets at once, disrupting their ramp plan before they can deploy Annoyed Altisaur or Boarding Party. Steel Sabotage adds more artifact disruption by countering or bouncing key permanents such as Bonder's Ornament, keeping their mana development behind schedule. Extract a Confession is weak here since the opponent's most threatening bodies like Annoyed Altisaur and Avenging Hunter often outsize what we want to trade off, so it comes out for more targeted artifact hate. Giant's Boulder is too slow in a race against a deck built to ramp into oversized threats, so cutting it for proactive disruption improves our matchup against their land destruction and acceleration package.