Hard to tell. it is emotion potrayed by emotion, but there sort of is no other way to potray it opther than creation magic. The fire is pure rage, per se

Description: Moko's Teller Sprites! Or is it..? Black Rage ATK: Melee + 1,000-855,850 Flash ATK: Rage + 300,000 Blade ATK: Melee + 60-6,000 Beam ATK: 50,000 Melee: 10-10,000 White Rage ATK: Molten