[Raven waits patiently while he writes, polishing off the last of his drink. It wasn't bad compensation, for having to air out all his dirty laundry to a stranger like this. He sets down the empty glass before responding.]

Normally they're harmless, so long as ya don't fool around with 'em. [Which goes without saying, like working with any kind of delicate equipment...] I guess the only thing I could think of is if ya used too many artes, then you'd get tired out real fast, even without a blastia like mine.