This charming loop kicks off when you use Splinter Twin to grant tapping power to Lurking Roper, generating a hasty token copy of the treefolk. Because Lurking Roper naturally refuses to untap during your untap step, it relies entirely on its passive ability to untap whenever you gain life—a condition seamlessly met by Trostani, Selesnya's Voice, whose static-like triggered ability rewards every entering creature with a life total boost equal to its toughness. That fresh influx of life immediately triggers all your Lurking Ropers to untap themselves, allowing you to endlessly tap the original creature and repeat the cycle for boundless creature tokens, endless entry triggers, and infinite life.