I'd agree no mention of magic. It isn't referred to as magic in the manga nor does it seem to have magical properties. I'd say they would be termed as spiritual powers (or ki like Destinyheroknight said). In the most scientific terms you might break it down to psychic and psionic abilities but not magical. The only one(s) that seem to use magic is Free and maybe some of the witches. Their abilities are different in nature and only Free refers to his abilities as magic.