This elegant loop is fueled by Planebound Accomplice, whose red mana activation drops a planeswalker directly from your hand into play. As that planeswalker enters, Cloudstone Curio triggers to bounce a *different* permanent of the same type back to your hand—specifically, another planeswalker you've already deployed. This creates a perpetual relay race where Chandra, Bold Pyromancer can enter, use her +1 ability to add two red mana and deal damage, and then bounce herself when the next planeswalker tags back in. Because Chandra, Bold Pyromancer provides the exact red mana needed to keep activating Planebound Accomplice over and over again, you can repeat this exchange indefinitely for infinite activations and damage.