Battle Theme: [link]
Fire is the element of Heat, Destruction, Grace, and the adrenaline of battle.
Dinx normally cannot sharpen her body, but absorbing Fire Energy allows her to smelt her metal body into (somewhat) sharp blades. She can also use her excess Fire Energy as ammunition. Please note that Dinx knowing Fire spells and absorbing Fire Energy are two separate things.
By now, you should have a good guess as to where this series of images is going.
Heartblade & Dinx (C) by I, Nick Roger/~The-Knick. Do not copy or distribute.
(PS: I personally really like how "Fire" is spelled in Reun (F-y-r))