This elegant loop is fueled by Soul Warden, which turns every new body into a life-gaining event to satisfy Trudge Garden's life-trigger condition. Once you pay the initial two mana to get the engine rolling, each created Fungus Beast token enters the battlefield to trigger Mana Echoes, which scales its colorless mana production off your growing horde of shared-type creatures. That windfall of mana easily pays for Trudge Garden's recurring cost while Soul Warden concurrently feeds you more life, creating a self-sustaining loop that floods the board with infinite trampling beatsticks.