Magic that conjures energy or matter from no where, especially to be used in a violent or combat-related way. There are many forms of it, more often than not overlapping with Factor-Arcana to turn elements/factors into implements for warfare. Sometimes though, pure energy shot straight from the palm into the face of an opponent is enough, without the flaming fanfare nor the lightning lightshow. 

A form of martial-arcana is spellblading, the act of tricking the body into accepting the blade as part of it through the transitive property and encompassing it in an element to increase damage output.