Sky is the vast expanse outside of The Field. There are exactly 5 The Fields in sky, all of which are allied forces. Sky used to be thought of as everything that could be discovered not because of its enormus size, but because of the sheer power of the beings inside that kept anything from getting out. For being a void, sky is surprisingly full, with over 1% of it being tangible matter, mostly from the hundreds of omnipotent beings populating it. Sky is populated with several Orbis from its five The Fields, but is even more populated with coros from Orbis that became Class 2 and spread them all over sky.
The first entity in sky that was discovered were sky's own stars, which shot highly unstable Type 2 Orbis at things in sky with the rate of fire increasing the closer they got to the edge.
The second entity discovered in sky is actually a group of beings known as wireframe entities. Wireframe entities appear as a glowing outline of the being's true image, and the wireframe entities are capable of destroying large chunks of The Fields with a single strike of their fist. The only downside is that they can be physically attacked, meaning they can be killed by the lasers from The Field. Wireframe entities make up 80% of the entities in sky.
The third type of entity discovered in sky are called Super Shurikens. Super Shurikens are large metal pieces that are 40 normal Orbis thick and half the length of the field. They can fly around at speeds about 1.2 x faster than The Field, but because of their shape, a well placed laser shot can easily bring one down. Super shurikens make up 15% of the entities in sky.
The fourth and final type of entity discovered in sky were type 2 Tail Lumps. Tail Lumps make up 5% of the beings in sky.