The Play Pulse appears as a visible waveform in VHS tracking lines during playback - a luminous horizontal pulse that travels through the magnetic substrate. It carries encoded timestamp data from the exact moment of each throw. The pulse intensity increases with consistent attendance across multiple leagues, while missed events cause the signal to fade toward static. Most significantly, every Play Pulse generated in any league simultaneously echoes through all 16 movie simulations, creating a connected web of magnetic evidence.

The Play Pulse serves as the Chaintrix's recording trigger - it transforms every throw into magnetic data that becomes permanent evidence across all leagues. It is the system's heartbeat, validating presence through visible waveform patterns that cannot be faked. Players whose pulses maintain consistent intensity thrive within the survival system, while fading pulses signal impending elimination as the recording substrate slowly forgets those who stop showing up.