Gravity

Gravity is a dual element composed of Earth and Dark. 
== Gravity as a Force ==
Gravity is perhaps the least understood of all the Elements, especially when considering the fact that almost every creature and object appears to have at least trace amounts of gravitational energy regardless of any other affinities that they might hold. For most occasions, Gravity can be understood as an exertion of downwards force on objects, but which direction is down is not always clear. Down for most of Aum's hemispherical surface wraps around the planet and points towards its core with the notable exception of the Dark Side Aum, which defies any influence of the planet's supposed "center of mass" and points straight up into the planet with equal force all down along its circular plane. If one were to stumble between the Edge of the World and the Dark Side of Aum, they would notice this gravitational shift immediately as down to them would reorient instantly by approximately 90 degrees.
Objects with particularly high amounts of mass produce much downward force towards their cores but are also better at resisting the gravitational energy of other massive objects, naturally mitigating the risk of all objects in the universe colliding into one another and being condensed into a singularity.