New Gamemode Idea: All Dark

So, what I was thinking, I know this sounds good on paper but when you put it into action, it might not do so well, but I thought of a fun little Gamemode called All Dark. Basically, the concept is that everywhere is dark, and you cannot see. You are required to start out with tons of wards, to which you can place everywhere to see. You of course can still see enemy's in a bush if you're in one, and you can see other allies too. There could even be a map, picturing a forest and it being nighttime and all these creatures coming out from the forest (jungle). Even if it sounds a little crazy, I want to here your thoughts!