Assassin eyesight

Assassin hid in the perfect spot to observe the straightforward battle — the crane that loomed beside the cliff. The location was about 500 meters away from the site of the skirmish. As a Servant with eyesight surpassing that of a human he could clearly discern the two’s conflict, even spotting their expressions with accuracy. Meanwhile, the two combatants barely had time to consider if they were being spied upon.

- Fate/Zero: Act 3, Part 4