blackwater dagger

[micnawtm]

Hey
I found blackwater dagger
itt has not bad stats but how does its ability works? Its against me or against mobs?
it has
Ap 3
atack chance 40%
dmg 1
Block chance 5%
blackwater misery

and that misery...i dont know how it works
its written

Condition category :blood disorded
constant effect
Ap 1
attack chance -50%
Critical attack chance -50%

this item has purple aura

[Pyrizzle]

Blackwater misery effects you.

If you wear multipul items that have blackwater misery they do not stack.