Expect maybe another Acnologia one-shot soon. This guy deserved way more in-depth stuff for a final villain.
Pleasant Burning Acnologia (anon)
It had taken...less time than Acnologia expected to become accustomed to the scent of the flames.
When one goes around annihilating all dragons, one cannot expect to leave the area surrounding it unharmed–or unlit for that matter.
In the beginning, it was hell; the same hell he experienced that day the dragon formerly known as Acnologia snuffed the light from his own home. The rancid smell of the dying mixing in with the grass, the stones, and even the very air giving off their own horrible burning smells. Mixed together it was as if someone designed a weapon not only to pierce your nose but also your eyes, your ears, your mouth; all of it stirring in your mind to burn together.
Now that very smell–which used to disgust his very being–became the scent he carried with him everywhere he went. He once heard a rumor that you could tell Acnologia had come when one smelled the scent of a burning corpse in the vicinity. A true bringer of death, one whose smell could characterize his entire existence.
To those people he merely laughed and reveled in their fear of not only him, but his presence, his mere scent leaving them choking, gasping in horror before he burned them too.
He would burn them all, eventually. Every last one. And then he would delight in the realization that all the people who had feared him would eventually become one with him. The burning masses clinging to him so, because they would have nowhere else to go. Not after he was through with them.