This clever self-mill engine turns the unique wording of Mirror-Mad Phantasm against itself by using a clever copy trick. Because Moritte of the Frost enters the battlefield as a copy of Mirror-Mad Phantasm (while retaining its own distinct name), paying its activated ability causes you to shuffle it away in search of a card named "Mirror-Mad Phantasm." Since no card in your deck actually shares that exact name, the search fails to find a match and dumps your entire library straight into your graveyard.