Duskblade is supposed to be night/lack of vision-themed but its just damage

This item has so much potential but nope its just a braindead +150 damage on top of your assassin combo that already overkilled the target by 600 hp anyway.

What if we reworked it to actually be something that involves the "night" and "lack of vision" theme instead of just braindead extra burst?

For example:

Duskblade of Draktharr; 2900 gold

+55 AD +10% CDR +15 lethality

Passive: After leaving enemy vision for 8 seconds, your next auto attack (ends after 2.5 seconds) leaves the enemy unable to see for the next 0.75 (+0.01 per point of lethality) seconds.

Would be more interactive and strategic than just "hehe xd i missed all my skillshots but heres a 1.2k damage kha Q". For example, do you want to open the fight by collapsing on the enemy carry, or do you want to blind the enemy lulu to stop her from peeling for her team? Or do you want to blind the enemy malphite and force him to guess where he has to use his ult?

So much skill expression and strategy could he shown with this new passive, while the current one is just braindead burst (which btw nobody wants in the game.)