New trinket(s) and/or consumable: The un-vision game.

So whilst spectating an ARAM game of a friend, with a Teemo present, I noticed the enemy team bought Oracle's extracts, as smart players do, to remove the mushrooms. And that did turn the game around for quite a while, as counter-plays are supposed to do, or at least help with. Even though that friend and his team did eventually manage to win the game, despite the oracle's, it did get me thinking about how relatively ineffective a Teemo (or Shaco, and other direct or indirect invisibility-using champions) becomes once Oracles are in play (In much the same way that they are relatively over-effective without it).

At first I thought of an ARAM-only thing, to help play with vision and/or pressure champions who have the extract active, but I reckon it might become a very interesting addition to summoners rift as well.

In competitive play casters and annalists regularly talk about the vision game. Oversimplified, there's a lack of vision, so players buy and place wards, and that can be combatted with several ward-removal options. Then there are some champions who can help create vision (Ashe and Quinn for example), and also there are champions who can limit vision (Graves, Nocturne, Ivern to a limited degree). But there's no such thing as an item: consumable, trinket or otherwise, that limits, removes or alters vision in any way, except through the ward-removal option. To play around the vision, instead of with it.

Why would someone want that? For one, it could give some alternative power or playability (and thus desirability) to invisibility- or camouflage-champions. And it would intensify the vision game. It could set up new ways to set up a (team-)gank, dragon or baron steals, and influence the measure of safety some split-push comps have. Just a few examples I think that would be affected.

So what am I thinking here? Several suggestions:

• Vision-blocking tokens: once placed they obscure vision depending on your position. Imagine a slab of metal or wood, or a magical shadow screen, with kind of the same width as a ward, that you can place, for example next to a wall (or out in the open if you would want that). Have it have 3 or 4 hit-points, much like a Control Ward. Hide behind it (or bluff, and don't hide behind it at all), perhaps with a team-member, wait for the enemy to pass by or destroy it and surprise them. [Perhaps that'd need to make the item to be impassable (even though projectiles would/could fly over it, like any wall). But I think that'd create a whole new range of (ab)uses that might not be desired, like blocking off Baron Nashor's pit, or one of the entrances to the base, to name a few.]

• Along the same line, using champion's abilities as an example (much like Corki's Q in Twisted Treeline, or Kayne's E in ARAM), perhaps a consumable seed to create a patch of brush like Ivern's W, or a smoke-canister like Grave's W.

• Then there's another option for an inverted Oracle Lens: instead of revealing invisibility, it creates it. Or rather camouflage, I guess. Either just the user, or a small area around the user (could be mobile, or stationary) for 1 or 2 seconds. Or go for another option: instead of invisibility or camouflage, create a bit of fog. The enemy then would know something's cooking, but wouldn't be able to determine what's cooking exactly. Could be one champions trying to generate some hoax-pressure, bluffing. But it could also be the entire team bringing a surprise.

• Taking it smaller in the grand scheme of the vision game, add a effect to an item, or have a consumable, that makes a specified area or an area around you temporarily immune to sweeping/detecting.

What are your thoughts on this matter?

PS: whilst thinking about the fog.... imagine a champion (probably a jungler I reckon) using and/or creating fog... interesting gameplay? I'm envisioning a kind of Singed right now, creating fog (instead of poison) wherever he goes, that lingers around for a few seconds.)