[@Prince of Seraphs]

For some god forsaken reason it's harder to find then it out to be, but if you're blades aren't too broad perhaps something similar like [url=http://thumbs.worthpoint.com/zoom/images2/1/0311/30/damo-chinese-hidden-double-daggers_1_d12a0d79ebc8c0fd5219419e23066bcc.jpg]this[/url]? Though it'd probs be tough trying to hide two scimitars in a straight staff, what with scimmies being [url=https://youtu.be/dMHle170Kxw?t=10]CURVED. SWORDS.[/url] Personally I'd suggest something like [url=http://i.imgur.com/PnOyRMx.jpg]this[/url], were the weapon is detachable at the hilt so it can either be two swords or a single double-ended twinblade of sorts.

Alternatively, forget making it fancy, just get yourself a nice solid stick to be the shit out of people. Because while some savvier folk may believe you hide a blade in your staff, they often overlook the fact that it is still a staff, and that beating people with sticks is a time honored skill and tradition of humankind since they started to kill things.