The Degauss Testimony appears as a bulk tape eraser housing wrapped in partially-degaussed magnetic tape, its surface showing ghosted images of erased performances bleeding through like double-exposed film. It emits the characteristic high-pitched whine of electromagnetic coils at full power, and when held near other recordings, it leaves magnetic shadow data - fragments of destroyed performances that testify more honestly than the original footage ever could. The tape wrapped around it constantly shifts between recorded and blank states, as if the Testimony itself can't decide what deserves to be remembered.

It enforces the principle that magnetic media can be reused, just like tag positions - when you fail to defend your recording, the Testimony erases your legacy to make room for the next player's performance, proving that in the Chaintrix, permanence must be earned weekly.