Rough sketches 013 (Patreon)

These concepts encompass the exodus defense system, like the Valkyrie and other automatons designed to protect the floating kingdom from outside menaces.

Also, the first concepts of the proto-Nox are here, entities created as a result of the absolute zero event in the necropolis thousands of years ago. They are also called echoes or vestiges of existence, meaning that they are fragments of the consciousness and life of beings that no longer have a form in this realm since everything that made them what they were was stripped away by the gravitational pull and cosmic radiation of the void left by the sudden closure of omega gate. The nox are non-existences based on the recycling of their own energy to persist, beings that relive their memories as an eternal dream as a way to continue to exist in the realm. This type of existence is the result of the stripping away of the soul, fragments of primordial light also known as the heart of the universe or the kosmos soul.

Also, it's worth noting that the natural appearance of the nox is not supposed to happen until the universe enters its cosmic dark ages during the heat death since they are a byproduct of the increasingly high levels of entropy, so the nox seen in Arcadia show up way too early on the cosmic clock. These nox also eventually would evolve their way of existence and become entities that devour light in order to appease their desire to "be complete" becoming mini dark holes, since nothing will seem to satisfy them, they are just hollow creatures that eventually act on instinct when light is close to them.