Eon Strid: Rusning (Stridskonsttekniker)

[Yahuna]

Is it me or the Rusning Stridskonsttekniker is does not appear in any of the Strid's book martial arts?

 

[Wormrose]

Indeed, and neither does Benbrytning, Blind strid, Snabbladdning nor Obeväpnad parering.