Skill: enchant criticals.
This skill is almost impossible to learn.
The skill is automatically in use.
By knowing how to hit vital parts of body by scoring critical hits is good but that is not all there is to it. When practising such tecniques warriors tend to lose some of their hits potential, as swinging weapons in such ways cause strength of your attack to lessen a bit. With good knowledge in this such potential losses are minimized so that even greater, devastating damage is possible.