Frendera's Flask

I saw a video with some of the changes to the flask + changes to shock battery. That really removed a whole playstyle on kallari, just to make another raw dps item. While more people will use the item now for sure, I think it stifles build diversity. I'm not the biggest league player, so I can't name items, but I feel that game has certain items that only shine with certain heroes.

Maybe make this item work if you're stealthed period and make the next ability/attack do the bonus damage. That way kallari,wraith and all your following stealth heroes can be able to take advantage of this.