User blog comment:MarineroLelouch/Power Ranking and Classes./@comment-112.208.53.170-20140212003052/@comment-24066070-20140212182150

The knife would be considered part of his fighting style, but it doesn't mean he's a strong mage, since the knife isn't magical or summoned by magical means.

Besides, Racer's powers in that filler arc were never sufficiently explained imo. He just had speed, but no mention was made whether this was done by affecting a larger area with his slowing magic or if he "traded" it for real speed.