T.D.o.N.B: The solid 5%

The class unlocked the following skills: 'Blade mastery',  'Breathing technique',  'Ki', and 'Ki edge'.

Some do sound familiar, don't they? I'm gonna omit those, to focus on the new ones, because it's pointless to explain the same stuff twice.

'Blade mastery' although it might around similar to 'Weapon mastery', and all of its evolved versions, it was slightly different, as the whole approach was less about the weapon itself, and more about the balance between the weapon and the body of the user. 

'Ki edge' was a technique to fill only the cutting edge of the weapon with Ki, which allowed better density of the energy, while keeping the flexibility of the whole weapon. Kinda like they make katanas.