The Aeternexa is a mechanical device, looking much like an antique pocket watch, measuring 39 mm in diameter and comes attached with a gold chain and onyx pendulum at the end. It is made of 24k gold with a representation of celestial alignment between the sun and moon on the front, seemingly perfectly smooth sapphire, patterns in the crystal seem to be within the sapphire itself. Inside the device are a series of 3 hands and 3 dials of rotating symbols inlaid into the face. Each hand and dial moves independently of the others, when put together each hand will point to 3 runes in alignment. The symbols align in such a way to provide the 9 runes required to navigate the Verum Transitus.
Abilities
The device allows the owner to navigate the Verum Transitus, though it is only one part of the puzzle of navigation. It acts as a kind of compass, it can tell a person where they are and where they are going by the symbols on the interior face. While the Rose Codex is capable of showing a map from one place to another, the Aeternexa acts like a compass to this map.
The celestial alignment on the cover shifts and changes, it is able to locate the nearest entrance to the Transitus. The sun and moon move across the face and the geometric lines shift to point the owner at the nearest point which connects to the Transitus, no matter where it is.
Use
To use the device within the Transitus one only has to read the symbols and move through the Transitus in the direction to align each dial and hand. As one approaches their destination, the symbols will align and the path will reveal itself. Outside the Transitus, the cover acts as a kind of directional compass, though somewhat more complex than that.
Origin
Legend has it that this device is as old, or nearly, as the Rose Codex itself. According to myth the Rose Codex was created but soon became too complex to navigate reliably to solve for this, the Aeternexa was created. While there are known to be at 3 copies of the Codex, only one Aeternexa has ever been found. Some legends say that the Aeternexa was created by the Transitus itself, to provide a way to navigate it by someone chosen by the crossroads itself.
Properties
By all appearances the watch is a mechanical device made of 24k gold. Once can physically hear the internal gears clicking the same way one would in a pocket watch. The face cover will not open to anyone, it can only be opened by the owner of the device and the back of the device does not open, the entire exterior appears to be two parts the lid on the hinge and the rest of the body is solid gold. The symbols inside are not static and change as the owners location changes, even if the hands do not move.