CC: THANKS b/c there shouldn't just be like 5 canon superpowers. I'd take invisibility, size manipulation and weather control. OH and super speed. Just imagine me, a tiny invisible tornado-producing speed demon.
Fire or light is a symbol of the holy Eucharist because, it represents God's purifying presence. Another reason it is used is because represents the light of Christ. As Christians are commissioned to keep this light shining through their whole life.