This is magic granted through the manipulation of the Natural flow and its understanding. It manifests in the harnessing of the space within reach and touching the flow in that space. It is a dangerous effort where harnessing the chaotic energies of this flow is a task to be attempted only with the help of someone to guide you.
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Gestures and foci are important when your character uses this magic. Equations of magic would be equally important, as such glyphs and runes allow the anchoring of the flow to a certain point in space.
One must be careful when practicing arcane magic and planar transport in particular. The death of Cidias, Celestial of Harmony and order and the ritual that pushed Heavens away from the Plane of Flesh disrupted somehow the fabric of the ethereal plane. Several creatures hide within it and do not always have your best interest in mind. Arcane magic is also subject to erratic behavior in some places.
Some people manifest a powerful pull of the natural flow without any training. These people are taken in by Blue Council educators in order to teach them how to harness their powers. Some of them escape detection for a very long time and are then hunted down after proof has been obtained of the danger that they pose to the people.
(Mechanically: For players wanting to go for a wild magic sorcerer, we will be using a homebrewed version I have found to be quite a bit more powerful than the PHB one, but can also backfire much more dramatically.)