The story 

The Blur of Darkness — a Ninja’s Defender, out of the novels

The Blur of Darkness came out of a book series I’ve been writing by the same name. The heroine runs a floral design company by day and works as a modern Ninja by night — and like a real Ninja, she carries ancient weapons, updated for her missions. She needed a capable self-defense tool with one job: stop the bad characters quickly. So I built one.

The series is grounded in real people — a whole cast of them, actually — and one of them, Norski, is closely tied to the second book. We built a Defender for his series too, so the two tools are cousins in the same universe. I’m writing the third book now. (One fun aside: the tool carries a digit-capture hole, and across two volumes she hasn’t used it yet — the story never called for that kind of takedown. Maybe volume three.)

Here’s the design. The curved head carries a chisel edge; there’s a finger-retention bump — one of the first we ever built onto a Defender — plus a chisel edge at the base of the handle, and lanyard holes for easy carry. On the head, two forward points. And the digit-capture hole doubles as the Kydex-holster mount.

Same idea behind it as every Defender: not pain for its own sake, and never to punish. The Blur is built to stop the threat and get you clear. In an anti-grab escape, set the chisel edge on a grabbing hand and rock it — the hold comes loose and you break free. If a grab is gloved, a forward point set against the hand gives you the leverage to peel it off. The chisel edge at the base of the handle lets you work close for counter-grabs — driving against a grabbing hand or arm to break a hold, or against the body to push an attacker off and make distance. The two points let you move an attacker or break a grip. Against a lesser threat it’s a control tool; against someone who won’t stop, it takes away his ability to keep coming. Same tool, your judgment, matched to the moment.

The digit-capture hole works as designed: capture a finger or thumb, align it down the handle, pin it with your hand, and now lifting or turning the tool steers the attacker whichever way you choose — real control in a struggle. And the finger-retention bump lets large or small hands find the right hold, so the tool fits your style and stays comfortable and secure under stress.

This is a highly capable tool, and capability demands judgment. The more a tool can do, the more it matters that you use it only to stop a real threat and get to safety — never to punish, never once the threat is over.