Perfect Edge Stance
(2
points)
4th degree
Razor’s Edge
Bonus Action (Stance)
By relying on your training and countless hours of repetition, you can easily manipulate the battlefield to position yourself where your strikes are able to inflict the most harm.
Your weapon attacks score a critical hit on a roll of 18–20. If you already have a feature that increases the range of your critical hits, your critical hit range increases by 1 (maximum 17–20).
Source