Disclaimer-I do not own the Bartimaeus Sequence, Percy Jackson and the Olympians, or any related works by their respective creators. I do own my OCs, and the plot of this story - so please, no copying.

Please read, review, and enjoy!

Prologue

A young man strolled down the empty street. The moon had long ago taken shelter behind the clouds, casting an eerie light onto him as he disregarded the most recent curfew. The pain in his side grew as he walked. He had half the mind to chuck the knife and the gun as far away as possible. But the charge was clear in his mind: kill the magician without any magical traces.

He passed by very few humans as he completed his journey to the opulent mansion. The old magician had secluded herself at the end of the Spirit Rebellion, something that he had fortunately been spared a part in. He supposed that his current master had done the same.

The Spirit Rebellion caused many magicians to lose their lives. That thought brought him a foreign sense of pleasure. Unfortunately, his master had not died in the Spirit Rebellion, having fallen sick on the night when he was supposed to attend the show that had robbed so many of their pitiful lives.

Despite the loss of power, his master's heart was still clenched by greed's cruel hands, and deemed that the old magician who called the mansion before him home needed to have her life snuffed out.

He quickly checked the planes. Finding what he was searching for – a green nexus of force surrounding the mansion on the sixth plane – he evaluated the level of the protection. In her old age, his target must have lost the majority of her skills, or have deemed it unnecessary to have more advanced protection. There was multiple small holes in the nexus in between the threads.

Using the Obedient Breath to pry apart several filaments, he did not trigger the alarm as he created a hole wide enough for him to walk through. There was always loopholes in summonings; he was told he could not kill the magician by magical means, but he had not been prevented from using magic to achieve that goal.

He stepped through the hoop, holding the knife and gun – though it pained him – close to his chest to prevent them from triggering the alarm. He made his entry through an open window. It appeared the magician had believed her nexus, and the pair of guards now coming into his view, to be sufficient enough defense.

He flipped through the planes once more. The guards were foliots on the fourth plane. Utilizing the loophole given to him, he reluctantly devoured them. Firing a Detonation would cause too much of an alarm.

He finally reached the master bedroom. A Convulsion was suddenly shot at him. He ducked, and the magical attack hit the window behind him. A guard stood before him, seemingly a male human in his late twenties. But on the fifth plane, the guard was a djinni he had known for many years. "Seishen," he greeted the female djinni.

Emotions flickered across her face in quick succession. Shock, disbelief, and then horror. Horror at what this confrontation meant, and the promised outcome.

"Yūjin," she whispered. "I never thought that this would…I mean, we've always known there was the chance…" There was despair in her eyes. If she was truly human, he knew tears would be sliding down her cheeks. "Why did it have to end this way?" He remained silent, not trusting himself to speak.

Neither made a move to attack the other.

"What's your charge?"

He closed his eyes. "To kill the magician Agatha Warren, and anyone that stands in the way of my doing so. I am not to kill Agatha Warren by magical means." He held up the knife and gun. "I have to use one of these instead."

When he opened his eyes again, she had a look of defeat on her face. "My charge is to protect her with my life, and kill any intruders…" Her voice was quiet. "Do you remember our promise, Yūjin?"

His eyes widened. He remembered it all too well. "No," he protested, but he knew it was pointless. She had made her decision long ago, and she was going to stick with it. "I can't do that."

"You promised."

"But you're the only spirit I care about-"

"Yūjin, it's the only way." She took a step forward. "I'm happy knowing you're still be around. That you'll live to see a time when magicians don't summon spirits just to be their slaves."

"We both know that could never happen, Seishen." He was desperate. He would rather have his essence torn apart than be the one to end her existence.

"Please, Yūjin," she begged. "Do it for me."

He finally nodded. "Goodbye, Seishen."

The last words she said were, "Goodbye, Yūjin." Then his Detonation destroyed her essence, and he was alone in the world.

He turned to face Agatha Warren. Though he knew the knife was the quieter way to kill, he aimed the barrel of the gun at the sleeping magician's head.

The sound of a gun being fired awoke all of the servants in the mansion.

A/N Hello, reader! My name is TheHopefulSoul, and my Quotev account shares that name. Over on Tumblr and DeviantArt, my name is my former one - SoulErrorArwitch. As a warning, this story takes place after the events of Ptolemy's Gate (as you may have guessed) and Heroes of Olympus, and before the events of Trials of Apollo. Therefore, there will be spoilers. Reviews are greatly appreciated. However, flaming is not. Thank you for taking the time to read both my story and this author's note, and have a great day/night!