This narrow sheath is embedded in the forearm and hand of a warforged character, occupying space on the body as if it were a bracer. Once it is in place, the warforged can insert a normal magic wand into the sheath, whereupon it merges with the character’s body. The sheath can hold a single wand. Once a wand is inserted, it cannot be removed until all its charges are used up, at which point the wand drops out of the sheath and a new one can be inserted.
A character can activate a sheathed wand (assuming the character could activate the wand normally) without having to retrieve it, simply by pointing a finger and thinking about activating it. Thus, the character can activate it in an area of silence or while grappling without difficulty.