This clever win condition hinges on manipulating your library size to instantly turn a replacement effect into victory. By casting Paradigm Shift, you completely clear out your existing library and replace it with your graveyard, setting your deck to a tiny, known size. Once that stage is set, you activate Jace, Wielder of Mysteries and use his +1 loyalty ability to draw a card; because your library is now empty, Jace's static ability triggers and translates that attempted draw directly into a won game.