You should probably get ready for some trouble...
Kagero is amoung rare kind of Ninjas serving that she is a woman. She spent her years as her Grandfather’s pupil until he was killed by her major enemy, the Kawagami. She fought with Tsimbaro a trusted friend until he disappeered. She now is a Ninja Wanderer following where her feet take her.
Appearing a small ballista bolt, this ‘bolt’ is actually an arrow used by a god from a long-dead pantheon. Some sages theorize it was a weapon crafted by Loki to slay the world tree. Why it was never used escapes them however.
The spear has a divine-level anti-plant effect. When driven into the soil point first, a ever widening circle of destruction radiates out from the point, killing any plant material. Perfect for holding a kingdom’s food supply for ransom.
How far it extends depends of course on the GM, of course.