Helcan started to feel uncomfortable despite showing seemingly absolute tolerance to pain previously because Vaan's flames were no longer just burning the physical world; he was learning to target his soul – his divinity.
Thus, Vaan required practice. And due to time-constraint, he had to improvise.
From white flames to dark grey flames, then light grey flames, Vaan continued to apply different concepts – different actualizations to manifest flames with different effects.
Each time he got closer to his goal, his flames also became fainter in color. At the same time, Helcan's incarnation also felt increasingly frustrated and furious.
"Stop it! I said fucking stop it! Don't you dare use such disgusting flames on me, you wretched human!"
"And I should stop because you said so?"
