Living Dead Change: Instead of Death, make it impose "Weakness"

[Kranel_San]

Instead of killing the Dark Knight, instead just make it impose a special 1 min "Weakness" where their damage received is increased and damage dealt is lowered. I say special because if it's literally "weakness" then, if they die while it's up, they will get "Brink of Death".

I wonder why PLD can have invuln whenever they want unlike others?