Amulet Titan's entire game plan depends on a color-fixing, bounce-land-heavy manabase (Simic Growth Chamber, Gruul Turf, Crumbling Vestige, The Mycosynth Gardens) to enable Amulet of Vigor ramp into Primeval Titan or Scapeshift, so Blood Moon is catastrophic, turning most of their lands into Mountains and stranding their whole plan. Damping Sphere further slows their bounce-land and Amulet of Vigor shenanigans by taxing extra lands played per turn. Metallic Rebuke is largely dead since they run almost no artifacts to discount it against, so it's cut entirely for proactive hate. Race with Cori-Steel Cutter and Urza's Saga while Blood Moon buys the time needed to close the game before they can find an answer like Force of Vigor.