[Hassan, Foyer, Tohsaka Mansion]
The summoning beckoned. The nameless one, a mere imitation, answered. The wraith, that which moved unseen and unknown in life and death, the indecipherable killer in life and the cryptic wraith in death. An enigma, no, more an oddity, within the system of the grail.

Hassan I Sabbah had been summoned. More Specifically, the third old man of the mountain. The blinding light that shone throughout the room rapidly faded and contracted into itself, as if being sucked into an abyss from a centripetal force at the center of the circle. Assassin now stood, cloaked in billowing wreaths of pitch black cloaking that concealed his body except for his face, which was obfuscated by an ominous mask in the caricature of a human skull. A hateful, crimson red gleam shone from the small slit at the right eye of the mask, focusing on the master who had summoned Assassin.

A raspy but chillingly deep voice snaked through the foyer when Hassan spoke, as if heralding misfortune itself. A voice lacking the resonance of a hero, but infused with the unknown.
"Servant Assassin has heeded your call." 
A succinct introduction, without a hint of understanding or emotion. A mechanical reply promising necessary subservience, but hinting that nothing more would be given.