Sir Lancelot and Letitia Arkoniand
"You noticed it?" Lancelot said, seeing the carcass dissolve and the mist fade away. Being a magical spirit made awareness of these things all but unavoidable... not that it helped with identifying where it had gone; that was more skill-based than a feeling of "it's all gone somewhere". Of course, at this moment, there
was a magus leaping down from the stands, cushioning the blow with Reinforcement and popping up to stand head and shoulders taller than the king: Saber's Master.
"The mana isn't just gone, it's been drained--south-west, I think there's a park in that general direction."
Alkyrieaze von Einzbern
"Is it important that the Arena is undetected? Unless we think the culprit is there, I'm sure there's enough Servants there to sort it all out."