This clever loop uses Beck // Call as the engine, paying its mana cost to set up a turn where every creature entering the battlefield replaces itself in your hand. By feeding the resulting tokens into Ashnod's Altar, you generate the colorless mana needed to fuel Chivalric Alliance's activated ability over and over again. Each time you pay to discard and create a Knight token, Beck // Call rewards you with a drawn card, while Chivalric Alliance keeps your hand churning through your deck as you filter away excess cards.