The blood dancer

Fighters who make every attack count they instinctively know where their opponents' vital spots are and like they're in a trance, they move in a way that every attack hit their opponents' vital spots.

wounding attack

every turn you can use your bonus action to go in a blood trance which make every hit you do deal 1 stack of wounding

for every stack of wounding at the start of the turn take 1d4 necrotic damage and this damage cannot be regenerated they go away after the damage is dealt

precision of a predator

once per short rest you home in on your opponent's most vulnerable spot and your attack crits this does not trigger secondary critical hitting effects like the vorpal sword or the piercer feat

crimson stream

your blows have now become even more precise and each wound you deal is now cleaner and lasts longer it now takes a full minute for your wounds to stop bleeding

crimson strike

you have mastered attacking vital spots now you do 2d4 wounding per stack

crimson master

wounding is now second nature to you now all attacks you perform cause wounding stacks