"Down here"
A voice said causing the beast to look down and see a person whose hands held a sword. The beast felt baffled and for the first time since its birth, it felt fear, it felt panic. The fact that it wasn't able to sense the boy's presence left the beast frustrated.
"Hoo.." Apollo breathes as he forms his stand, as he focuses a swarm of energy begins to emit from his body. It was a blue hazy light that seemed to resemble a flame.
"Aura?" said the obsidian beast as soon as it recognized the power that surrounded Apollo.
The hazy light combined with Apollo's bloodlust created a harmony of death and strength. This blackish-blue halo then revolves across the boy's blade, slowly corrupting the light that dwells on it.