Milling

Milling a card is reducing a Supply pile without changing the state of your deck, by trashing a card and immediately gaining another copy of the same card—especially Provinces or Colonies. Milling Provinces and Colonies accelerates the end of the game, putting pressure on players who are trailing in score, since they both have less time to catch up to the leader and have fewer Victory cards left in the Supply to catch up with.

Milling is typically achieved with remodelers such as {[card|Remodel}}, Butcher, and Replace. The trash-for-benefit card Salvager also enables milling, and the Event Salt the Earth has a similar effect.