Feycraft

Feycraft, Shamanism, or Druidcraft, as it's often called, is a type of magic often utilized primarily by the Elves and Fianni. Shamanism is as much of a practice as it is a magical art, relying on the worship, guidance, and consultation of natural spirits in order to manipulate the ambient natural energy that makes up the world around them. Feycraft follows a few fundamental steps, as follows:

Interfusal

Interfusing, or binding with an object in question. The caster selects an object as their primary focus. This object can be as something small and simple as a blade of grass, to something lumbering and tall, like a tree. Once interfused, the caster can draw the ambient energy from that object and cause an effect to occur within a second's notice. Interfusing typically requires hand gestures, but particularly capable druids and shamen have learned how to interfuse with objects through concentration alone. Just about anyone can learn how to interfuse into an object, but more than one object requires a lot of mental training; as a practitioner of the art must focus entirely on those interfused objects with absolutely no other distraction in their mind.

Absorption

If the spell requires absorbing energy from the interfused item, the Druid taps into the ambient natural energy left making up that object, much like how a Fae would. This energy is temporarily stored within the druid, who may re-direct it into either a spell, or another interfused object of their choice. 

Casting

Sometimes, Absorption is not a necessary step to follow in order to cast a spell. But the spell is cast after stored energy is evoked from the interfused objects.
An example: A Feycaster binds themselves to a tree. By causing a rapid release of energy from the surface of that tree, they can cause it to shatter at the center, unloading a rain of sharpened splinters at a target.

Manifestation

Absorbing energy from an interfused object will cause its energy to be drained from the source. This causes the object to ripple with glowing markings, often called Wild Scars. Objects marked by these are able to be interfused with still, but are often unstable and dangerous. Too much absorption or interfusing on an object can cause it to become chaotic, prompting it to release in a violent eruption of energy.
Wild Scars are left when ambient energy isn't absorbed fully from an object, leaving it to spasm across the object after it was interfused with.
Interfused objects can be detected by those with a keen sense and knowledge over Feycraft, viewed as a small 'tether' that appears as a line to designate the energy flowing from that object and into the caster.

Localization

Oni-touched locales are known to cause curious effects to spells cast through Feycraft. This is primarily due to the location being tainted by the Yokai's influence, twisting the area with malignant energies that might interfere with spells cast through Feycraft.
At the same time, locales tainted by this are rare, but can be both utilized and perpetuated through a sub-branch of Feycraft called Voodoo. Voodoo works similarly to Feycraft, but typically absorbs energy from more abstract, darker sources.

Type

Metaphysical, Supernatural