Quote Originally Posted by Dualblade View Post
So if we accept this as true, that means its a Katana Gatling Gun?
I think it's more like a mechanical caddy. Each of the three swords has wildly different properties, and he chooses the weapon based on the opponent. Fighting someone he recognized as a defensive mage, he brought out the magic-breaker katana. In all likelihood, one of the other two is a heavy, armor-breaking katana, and the last a lightweight, precision katana.

I personally suspect that the dark magic aura was inherent to the katana, rather than to the caddy or to Zenos himself. Just an aspect of that particular legendary katana.