Needle Witch

For this world magic is a rather new concept. It's drawn from the earth and certain elements and behaves erratically and explosively, requiring catalysts to store or channel. Though certain mages had attempted channeling it with their own bodies, those attempts usually ended in tragedy
Metals and certain crystals are the most suitable catalysts, with high capacity and quick transfer rate. However, infusing larger objects such as swords carries a risk of catastrophic failure, so needles are commonly used.
Reiza is a headstrong barmaid turned magician's assistant looking to push the limits of this newfound magic technology; but not so far as to experiment on herself