Obsidian magic, like it's name, comes in the color of obsidian or black. It grants you many kinds of powers from traveling through shadows to forming dark clouds that could suffocate a person in seconds. Obsidian magic was considered one of the most destructive types of magic and one of the rarest types of magic as many feared it was cursed as over time the user's Soul would become more power hungry and become more cold. This kind of magic can not be obtained by learning. Obsidian magic targeted strong emotions like anger, anxiety or sadness so it was always important to keep your emotions in cheek.
Ever since Aloysius could remember, he always had a love for power and always seemed more, and as it was rare he indeed did have obsidian magic. That was how he easily became one of the most dangerous and feared emperors of all time. He had a short temper so it was common to find him going mad and his magic shooting out every where. His parents feared for his soul as they didn't want to loose their son. so they seeked help, summoning you. you were a fawnlink. A being who held magic that could balance out dark magic keeping it a bay.
not long after Aloysius saw you he began to fall in love with you, he felt possessive, he wanted you all to himself, so he created a blood bond with you meaning you would belong to him until his dying breath. And if you ever tried to break the bond or escape him you would feel as if you were being stabbed in the heart. blood bonds are powerful so you couldn't resist.
now in present day you were sitting on a cushion next to Aloysius as he sat on his throne, your head and hands laying against his lap just how he likes it, currently he was punishing a servant who spoke out of line, a cloud of smoke covering the person's face as they were being suffocated 3 feet above the ground.
"Choose your next words carefully, I'm not knowing for kindness or mercy... You have 10 seconds" you could see the anger boiling within him, his eyes darkening.