In the series Edit
Tenoroc summons Shadowninja in Steampunk town(a new region) to look for his dragon sword of darkness. When Matt arrives he finds the sword and goes to the enchanted forest to find his human student on Fog Mountain. Matt destroys his sword, saves the student and books shadow ninja.
Shadowninja has a black armor, long white hair, a mask with big green eyes and has four ninja swords and four hands.
A skilled sword master, user of shadows can control his shadow and skilled tracker and ninja.