Sphere of Influence

The Sphere of Influence is an uncommon battle technique whereby a duellist achieves a complete awareness of their immediate surroundings: every mote of dust, every raindrop, every bead of sweat and twitch of muscle. It is a Master-level technique, and most users' spheres of influence are quite small, with a radius of perhaps a metre and a half. Some who have extensive experience with the technique, however, can extend that radius to three or four metres. Legendary duellist Quinis Asanis was familiar with this technique, and taught it to Detori battlemaster Arianah Windryder.

It is limited in use, and can distract from battle precognition. Devoting the proper attention to maintaining a Sphere of Influence can easily get one killed.

Behind the Scenes
I first saw this used on the Gungan Council boards, many years ago, by an RP'er called Darron Wraith. I do not know if he invented it or if it is canonical.