Pyrokinesis does not exist so there is no spell that will let you be able to use it. The idea of kinesis is drawn from fantasy novels and Hollywood films. It has no place in real magic.
Furthermore, if you mean that you can create a fire ball such as one sees wizards do in Harry Potter or the role-playing game Dungeons & Dragons then you are not being truthful as such spells also do not exist.
Perhaps, before you make more claims that begin to look like role-playing (which is a violation of the rules of this site) you might want to consider doing a bit of reading and study about what real magic is all about. An excellent book to start with is "Modern Magick" by Donald Michael Kraig. You can find it on-line as a pdf at www.eso-garden.com/specials/ modern _ magick . pdf