[center][h2]Ruler[/h2]
[@Yukitamas][@SIGINT] [@Beloss] [@Holy Grail] [@DrowsyPangolin] [@Cu Chulainn] 
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[i][color=0072bc]"Uh...physical description...I mean, he was there for like, half a second maybe, so I'm not gonna paint a picture of him. Most-all Berserker managed to get was that it was a [i]black-haired man[/i]. Kinda long-ish, maybe..."

"-and something about his eyes being off."[/color][/i]

...ah, so that was it. That was the source of this feeling. Ruler's right hand, having released the cane previously held in it minutes earlier when the Boxzerker had appeared, clenched into a tight fist. 

[i][color=00aeef]“When the familiar reached him, Lancer had brought out his spear... not that it did him much good. I don't know if they fought beforehand or if it was an instantaneous attack, but a... man with black hair had put his fist through Lancer's heart."

"No, 'man' isn't the right word. I don't know what he was. He didn't seem like a Servant, but yet he struck Lancer down in a single blow.” 

“I looked at him for a moment, this 'thing'. I can't describe it exactly, but something was deeply wrong about him. He was... empty.”[/color][/i]

That could hardly be a coincidence. This thing, this existence that almost certainly one of the freak's demons and yet was capable of matching and exceeding a Servant in parameters, was interfering with the war. 

...and yet, Ruler's options were practically nonexistent. If this was a Servant, he could monitor its location from afar, call it to him with a Command Seal, see its weaknesses at a glance, or even force it to kill itself. Against something that wasn't a Servant, though, the cheat-like advantages of the Ruler class were null. 

[color=fff79a]"...it seems I was mistaken, then. The man you've described is not the property of that Servant; as far as I know, he is a true third-party."[/color]

He could put the war on hiatus until the offending party had been found and cut down, but how long would that take? The Holy Grail War couldn't be sustained forever, and if it was postponed for too long then it would end in failure, even if the third-party was apprehended. On the other hand, continuing the war as it was would only mean this thing would be able to continue acting. 

[color=fff79a]"Appears as a black-haired human male. Does not emit prana in the same way as a Servant. Capable of killing a Knight-Class Servant with little difficulty. Whatever it is, this being is now a public enemy of the Holy Grail War. Whoever brings me its head will be substantially rewarded."[/color]

Wasn't enough, that certainly wasn't enough, but what else could he do? Scour the city aimlessly until he found it? If it could detect Servants, as it seemed to be able to do, then that would be the blind searching for the seeing; he'd fail almost without question. Deploy his Noble Phantasm? Granted, that was an option, but he couldn't play such a card this early in the war, in case another Servant took advantage of the situation. 

...draw it out of hiding?

Killed a Servant, kidnapped a Master. What was its aim, exactly? To cause chaos in the war, to obtain those Command Seals, to locate the Grail? If he knew its motive, maybe he could stage a trap.

[color=fff79a]"Any suggestions to deal with this situation are welcome."[/color]