Talk:Slime Key/@comment-73.53.124.248-20160108013355/@comment-27561063-20160108013932

There isn't a use for it, yet.

If you go all the way through The Moss Blanket you can see a stone door with an "under construction" symbol on it. Since there is a key symbol on that door, my guess would be, that you need the second key there :)