Hyunkel gets a succession of two awesome moments, that made it in the anime :
During his fight with Hadler, after getting his armor pierced and filled with flames, he still stands up on pure Heroic Willpower alone, unleashing Grand Cross and wiping every low level mook.
Just after that first awesome moment, when Hadlar somehow escaped damage by using his mooks as a shield, and goes for the finishing blow from behind, with a lot of Evil Gloating, just as it seems he is helpless and screwed, Hyunkel tops his previous moment of awesome, using his very last spark of Heroic Willpower to turn his sword on his helmet back into a blade... piercing Hadlar's second heart, who dies acknowledging Hyunkel's victory, sincerely impressed by his valor. Hadlar's death does not stick, but this would be the first step to him seeking true victory as a Noble Demon, ultimately redeeming himself.
The Dragon Rock Castle is finally revealed to be a Humongous Mecha, wreaking havok with its laser eyes, massive strength and hordes of Mooks... until Dai steps in and single-handedly demolishes it.
Vearn finally meets Avan's disciples, who are at full strength, much younger, furious at the death of one of their most powerful allies, and outnumber him five to one... HE WIPES THE FLOOR WITH THEM.