User blog comment:Goddess of Despair/RWBY user battle tournament/@comment-71.23.72.131-20130224222236/@comment-71.23.72.131-20130226050345

The fire is noy magic, so the use of it causes minor to extreme pain to his body. But at is max power it can seal someone in permanent flames. Though this move kills him, so he only will use it when facing a great evil.