Item from The Dresden Files by Jim Butcher
An enchanted silver chain bracelet that generates a force shield — one of Harry's most reliable defensive tools, refined over years from a simple barrier into a sophisticated magical defense.
Harry's shield bracelet is a chain of silver links worn around his left wrist, each link inscribed with tiny defensive sigils. When activated with an effort of will and the word 'Defendarius,' the bracelet projects a curved plane of transparent force — a shield that can block physical impacts, magical attacks, gunfire, and supernatural claws. It's one of the first serious enchanted items Harry ever made, and he's refined it continuously over the years. The early version was crude — a flat plane of force that blocked everything on one side and couldn't handle sustained assault. Harry improved it iteratively, adding curvature to deflect impacts rather than absorb them directly, incorporating selective transparency so he could see through it, and increasing its ability to handle different types of energy. The current version can redirect kinetic force, absorb magical fire, and withstand impacts that would crumple a car door. It's not infinite — enough concentrated force will overwhelm it, and sustained magical assault will drain Harry's energy faster than he can replenish it — but it's saved his life more times than he can count. The bracelet is a focus item, meaning it channels Harry's own magical energy rather than storing independent power. It works because Harry made it, attuned it to his specific magical frequency, and has worn it long enough that it's become an extension of his will. Someone else wearing it would have a nice piece of jewelry and nothing else. On Harry's wrist, it's the difference between walking away from a fight and not walking away at all.
A chain of silver shields linked together, worn on the wrist. Each tiny shield is inscribed with a defensive sigil. When activated, projects a half-dome of translucent blue-white force. Harry's most reliable defense — he's replaced it several times.
Also known as: the shield bracelet, Harry's bracelet, the shield