Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

Can not target anything with it anymore - clicking on the icon triggers the countdown, but that's all.

Look at your weapon, or better yet, attack anything

Wow

Sometimes i can see a 'blinding strike level 5' on the first weapon property and it does sometimes triggers sneak attacks.

What about the offhand weapon ? - Never got blinding strike here.

How long is it supposed to last ? Often i could not see the blinding property at all. In other tries it showed on the weapon long after the countdown was finished. (seems somewhat random)

What is level 5 here ?

My char is a rogue7/non sneak class 9, so it should be a DC of 10+4+3+1= 18.

Blinding strike will be changed to 10 + (sneak dice) + (1/5 character level) + (1/5 rogue levels)

Does it stack, if the weapon already has onhit blind property ?

And is it possible to add the blind fx on the target on a successful hit ?

When you use the blinding strike feat your main hand weapon gets the on-hit property blindness, with the adequate DC. The property is added for 10 minutes or until you hit, then you have to use the feat again.

Ignore the "level 5" indication it's pointless, aotherwise yes it should stack with whatever properties the weapon already has, as for blind VFX I'll add that.