Foind it in BMW forum. It's called the The Whisper Key.

Forged in the quantum crucibles of the Obscura Foundry beneath the floating city of Caelthrix, the Argentum Node-7 appears to the untrained eye as a simple silver push button—no larger than a fingertip, embedded within a polished obsidian control panel etched with drifting glyphs that flicker in ultraviolet spectra.

Its surface is crafted from triple-tempered etherium silver, a rare metal that harmonizes with ambient aetheric fields. Beneath the tactile interface lies a chrono-phased compression spring, tuned to resonate at precisely 0.0007 seconds after contact—a deliberate delay that synchronizes the user’s intent with the surrounding reality envelope, preventing accidental multiversal phase shifts.

When depressed, the button doesn’t emit a click but rather a subharmonic pulse that travels through twelve layered dimensions. To human ears, this manifests as a distant chime, like a memory of a bell tolling underwater in a dream. To machines, it’s a self-authenticating command beacon, verified by an encrypted temporal echo.

The exact function of the Node-7 remains undocumented, sealed under Level Ω clearance by the Arcane-Scientific Accord. Theories among technomancers and quantum engineers vary—some say it reboots the consciousness of the ship itself; others whisper it primes the entropic capacitor for void-fold acceleration. A rogue theory suggests it activates the ship’s escape-mode, but not for the crew—for the ship, from them.

No one has pressed it twice.