When it comes to applying MTG (Magic the Gathering), there is no one-size-fits all answer. It depends on what you are trying to achieve with your deck and how often you want to play with it. Generally, if you plan on playing competitively, then you should apply MTG at least once a week in order to keep up with any changes in the metagame or new cards that have been released. However, if you just want to casually play for fun, then there’s really no need to apply MTG more than every few weeks or months. Ultimately, the frequency of when you should apply MTG will depend on how much time and effort you are willing to invest into building and maintaining your decks.