Fate/Lost Moonlight

Master Intro: Sebastian Aurelius Castellanos

Sebastian Aurelius Castellanos stood in the dimly lit study of his family's ancient mansion, surrounded by shelves of books and aged artifacts. The scent of parchment and old wood filled the air, and the only sound came from the gentle ticking of the large grandfather clock in the corner. As he gripped the broken sword, his catalyst, his thoughts were consumed by the upcoming Holy Grail War and the unknowns that lay ahead. He felt a mixture of anxiety and anticipation, but he was determined to give his all in this battle.

The door to the study opened, and a man with silver hair and a regal aura entered, flanked by a pair of familiars in the shape of winged lions. Sebastian recognized him immediately as Lysander Euryale, the mediator for the Holy Grail War.

With a nod of acknowledgement, Sebastian welcomed him into the room.

"Good evening, Mr. Castellanos," Lysander greeted him, his voice as smooth as silk. "I trust you are prepared for the summoning?"

"I am, but I must admit I'm nervous," Sebastian confessed, his voice wavering slightly, idle fingers fidgeting with the cufflinks of his suit. "I have no idea who or what I might summon with this catalyst."

Lysander's expression softened, and he offered a reassuring smile. "Such is the nature of the Holy Grail War. In my opinion, it's the unpredictability that makes it so intriguing. The broken sword you hold surely symbolizes a fallen warrior of great might and skill, and yet, the only Servant Container left is an Assassin. One can only wonder whom you might summon, who is both a mighty warrior, and yet, a harbinger of hidden death. Whatever the case, trust in yourself, and the catalyst, and an awesome force shall surely manifest in response to your call."

Sebastian nodded, taking a deep breath to steady himself. "You're right. I must trust in my abilities and the bond I will form with my Servant. I'm ready to begin."

Sebastian Aurelius Castellanos solemnly headed down to the vast ritual room of his family's mansion, the faint scent of aged wood and magic lingering in the air. The dim glow of candles illuminated the intricate circle he had carefully drawn on the floor. Twelve cats, his loyal companions, watched the scene with curious eyes. Lysander, the overseer of the Holy Grail War, loomed in a shadowy corner, even now guiding him through the process of summoning his Servant.

As Sebastian prepared the ritual, Lysander observed, his eyes filled with a sense of duty. "Remember, young Master, the catalyst you have chosen will determine the Heroic Spirit that shall be your shield in this War."

Sebastian nodded, clutching the broken sword hilt in his hand. "I understand. I hope this warrior, whoever they may be, will find it within themselves to fight by my side."

With a deep breath, he began to recite the ancient incantation, his voice echoing through the chamber. The room trembled with power, and the air crackled with magical energy as the circle came to life. The cats scurried away to safer corners, their tails puffed with anxiety.

As the summoning reached its climax, a figure materialized within the circle, shrouded in shadows. The air was heavy with an ancient presence, and the figure stepped forth, revealing the imposing form of an Assassin-class Servant. Clad in a dark cloak and armor, the Servant's eyes gleamed with wisdom and authority. In his hand, he wielded a formidable sword, despite the Hassan's typical preference for daggers and other such easily concealable weapons of their trade.

"I am the Old Man of the Mountain, Hassan-i Sabbah, summoned to answer thy call. By thou command, thineself shalt be as thy eft sword in ye Holy Grail War," the Assassin spoke in a solemn, old-timey manner that echoed through the room.

Sebastian stared in awe at the legendary figure before him, the voice of his Servant carrying an ancient weight that rattled him to his very core, full of timeless wisdom and ancient power. Sebastian struggled to find his voice. "I-I am honored, Old Man of the Mountain. My name is Sebastian Aurelius Castellanos, and I shall serve as your Master."