The following account was recorded in the agent's log during your transmission: Water's dripping steadily from the melting ice formations clinging to the rocky ceiling of this vast, naturally formed cavern. The air's crisp and cool, with a faint smell of wet earth and ozone-free freshness, like the atmosphere's being constantly cycled through some hidden, geologic ventilation system. A massive, crystalline structure – identical to the Merkaba envisioned in ancient Jewish mysticism – dominates the cavern's center, pulsing with a gentle, blue-green light that seems to be subtly altering the local gravity, causing a nearby stream to flow uphill, defying the natural slope of the cavern floor.