Child soldiers, what the hell?
It just doesn't make a lick of sense.
Noxian by birth, Kayn and others like him were conscripted as child soldiers, a cruel practice employed by only the most devious commanders of the empire. Ionian compassion was a weakness to be exploited—their warriors would hesitate before striking down a supposed innocent. Thus, barely able to lift the blade he had been given, Kayn’s first day in battle was also expected to be his last.
What part of this is an effective strategy? Send cowardly cannon fodder for the split second reaction time that they haven't even been trained to use? At least in modern war, they use a stupid-simple suicide-bomber method or point and shoot a universally powerful firearm. This... was just bad writing to make Kayn seem unreasonably talented.