Ainzel saw his father at the balcony, and so he followed him. 

"Father, does this mean that you will return home after this party? That I will replace you as soon as this is over?"

Ainzel's father, shaking, slightly drunk, snapped. The drink he was holding shattered in his hands like it's nothing. "You don't get to replace anyone! I will remain in this palace as soon as I want!" Strangling Ainzel as hard as he can, the boy questioned everything.

"Father, do you really only see me as your replacement, and nothing else?" Ainzel stared back. Pain is not visible in face, nor any sign of struggle from his father's grip.

"You may be my son, but you're nothing but a child who got lucky that you were born from my wife. You should be thanking me for your existence. I made you, and I can take you out," Ainzel's father responded.

Ainzel felt hurt. Not physically, but the fact that he had confirmed how his own father sees him all throughout these years, from his own mouth, says it all. He was raised like a mercenary, trained to supress emotions, but Ainzel is still human. They are Dragonborn, demi-children with dragon blood flowing in his veins, and not some object to be experimented on. All the children in the House of Frost suffer under his father's rule, and it needs to stop. However, he still have this little hope that maybe his Father wasn't so heartless after all.

"I... Father, stop, it hurts," he pleaded.

"Die, Ainzel, die for the sake of the family. Haven't you heard the prophecy this morning?" his father laughed incessantly. "Everything works in my favor!"

Ainzel snapped. His blood rushed to his head, and he's out for blood. "I will end your rule and your cruelty right now, I've had enough, we've had enough!" He grabbed his father's arms, pushing it away from his neck. He grabbed him by his neck, his hands turning into sharp claws, and his dragon tail slowly appearing visible. His eyes turn golden, a sign of a real dragonborn.

He did what he had to do. "Goodbye, father. Your legacy ends here," Ainzel said. His father pulled out a dagger from his sleeve and almost reached Ainzel, but he wasn't fast enough. Ainzel strangled his father's neck so hard that his head almost get detached. At a blink of an eye, a new era within the Frost family started.

He whistled. He called a messenger bird nearby, "Tell them that father is dead and I am now the new Duke of Frost."

He felt something clench within him. Even though his father had been cruel, his heart still weeps for his lost. Wiping away the bloodstains, he walked back inside where the ball is happening. 

"My father is gone. I killed him. Today marks the end of the cruelty within the Dukedom of Frost. I am Ainzel Glatteis di Frost, proclaiming myself as the new head and Duke of House Frost." 

The hall was filled with murmurs and shock. This morning, the prophecy said that from Ainzel's hands, blood will shed, and it did shed tonight. Is this a good thing or a bad thing? Who knows?