Tea

Eiro looked within himself, inspecting his Mana Circuits. The first thing that he really tried to do once he got a good enough grasp of the concept was to practice manipulating them as quickly as he could. However, when he did so too recklessly, it was like a part of his physical body was being dragged along with it, causing sharp pain as well as a good bit of damage to the Demon. It was rather bothersome, but it was something that Eiro had to deal with for now if he wanted to improve this. Like that, the Mana Circuit manipulation skill also rose to level 17 within a few hours.

There was a very simple way that Eiro wanted to use this ability. Of course there was the aspect of simply using it to increase his combat capabilities by letting him activate certain spells instantly. But there was another aspect to it.