Amulet Titan relies on Urza's Saga and Amulet of Vigor to bounce-land its way into an explosive Primeval Titan or Scapeshift turn, and Nature's Claim is a clean one-for-one answer to either piece. Into the Flood Maw can bounce Primeval Titan itself or use its gift mode to return a nonland permanent like Amulet of Vigor, resetting their tempo for a turn while we assemble our own combo. Mystical Dispute is not brought in since Amulet Titan has no blue spells to discount or counter meaningfully. Cut Pact of Negation and Wistfulness, since this matchup is a speed race best won by resolving our payoff before they hit their Scapeshift or Cultivator Colossus turn.