Spark has a form where if he sets his entire body alight into flame he goes 4 legged and loses the ability to use dark and light in place for 3x more powerful fire spells
He is often known to be unstable and hyper in this form and becomes it more often against his will due to him getting over exited and bursting to flames. Signs you should run for your life cause he's about to set you alight is small embers appearing around him and flames starting to cover his paws and tails.
-Spark

#GreyFlame