Swiping his sword across the ground, Ronin creates an electric wave that damages and slows enemies hit by it. It does a decent amount of damage, enough to severely damage a pilot, but not kill it (except while sword core is active). If the ordnance button is held down, the Ronin will hold out his hand (which can be held indefinitely) and when released will use Arc Wave.
It can be used to catch up to fleeing enemies, since Arc Wave goes awhile before stopping
Since it travels on the ground, it will bypass most personal shields (except Particle Wall). It will, however, take down an active Particle Wall instantly, making it extremely useful against entrenched Tone Titans.