This explosive loop hinges on turning a massive influx of red mana into an endless cycle of spell recursion. By casting Mana Geyser against opponents with enough tapped lands, you generate the baseline resources needed to cast Devastating Onslaught and duplicate Ardent Elementalist. As the Ardent Elementalist token copies enter the battlefield, their triggered abilities cleanly fish both spells right back out of your graveyard and into your hand. This leaves you free to replay them over and over, compounding your mana and leaving a trail of endless enters-the-battlefield, death, and storm triggers in your wake.