League of Legends

[Kaden]

Whether or not you have to buy more of them depends on the game. Vision Wards get their own stealth, which means you have to buy your own Elixir just to take them out (which is ridiculous enough on its own) and its possible for someone to only ever need one Elixir. Not likely, but definitely possible. The vision wards also don't display a buff on people, so you have no idea whether or not they can see you.

I disagree that it doesn't shut down. The characters with stealth are built around using their stealth as both a method of engagement and mitigation. Its like saying taking away mana regen wouldn't really hurt a mage because they can still attack.