This compact two-card loop relies on Seeker of Skybreak targeting itself with its own activated ability repeatedly, creating a self-referential cycle where the creature is constantly untapping. Because Mesmeric Orb triggers every single time any permanent becomes untapped, this endless flurry of untaps forces you to mill one card for each iteration. The genius of the interaction lies in how Seeker of Skybreak acts as its own fuel, turning a simple tap ability into an unstoppable engine that feeds Mesmeric Orb until your entire library is safely in the graveyard.