Aerancy is the practice of Aera being used directly by certain group of people referred to as Aerancers. Aerancers account for between 1-5% of the population of Aerstrum.
Aerancers are sentiums that are able to use Aera to cast spells. How one becomes an Aerancer is still undetermined, with all scientific studies proving inconclusive.
The leading theory is that eligible sentium are endowed with the ability to harness Aera at some point within there life. There has been cases with those who were previously not endowed becoming endowed. There has not been any cases of a sentium losing their endowment.
Casting spells requries geiwear to be on an Aerancers body, and the geiyus crystal to be charged and synced to the Aerancer. They must then visualize what they are trying to do while also using their body to mimic what they are doing.
For example, if an Aerancer wants to cast a fireball at a tree, they would mimic throwing a fireball toward the tree while wearing geiwear that contains a red geiyus crystal. The fireball would then shoot from the direction of the Aerancer at the spot of the crystal toward the direction the Aerancer was looking.
It's important to note that the location of the crystal, the mental capacity of the Aerancer, and the motions of the Aerancer all impact the effect of the spell. An Aerancer that barely motions to throwing a fireball will only throw it a few feet. Likewise, if they envision a small fireball, several small fireballs, or a large fireball, that is what will flow from the crystal.
One of the biggest challenges of being an Aerancer is building the mental capacity, or concentration to handle spells, as well as the resilience to be able to cast spells for a long period of time.
Casting spells draws on a sentiums brain and air capacity. While it doesn't hurt an Aerancer in the long-run, it can cause them to be physically worn to the point that they can be knocked out or go into coma's for extended periods of time.
There have been some extreme cases of Aerancers attempting to cast spells so powerful that it takes every fiber of their being and the Aerancer then dissipates into the spell.
Geiwear is the categorization of different types of clothing, armor, and jewelry that is worn by Aerancers that allows them to harness the power of Aera and cast spells.
Geiwear must be crafted at a Verusian Circle, and this is typically done by a very skilled Aeratech.