This clever little loop turns Stonybrook Schoolmaster into a self-contained token-producing engine by leveraging Song of Freyalise and Pemmin's Aura. Thanks to the first and second chapters of Song of Freyalise, the Schoolmaster gains the ability to tap for mana, which naturally triggers its own ability to create a Merfolk Wizard token. You can then use that very same mana to pay for Pemmin's Aura's untap ability, untapping the Schoolmaster so you can tap it all over again. By repeating this process, you generate an arbitrarily large number of creature tokens and entering-the-battlefield triggers while neatly recycling the same blue mana over and over.