High Level Inspiration

So a week or so ago, I ran a high level game, average level being 25. These games are challenging as the monsters just don't exist in the books that make it challenging. This is where you (as a game master) must needs rely upon the environment to make it tough or at least mysterious (I went with the latter).

I found the below picture on the net, just before the game and conjured the encounter of a living cloud bank...for Aihrde fans, the remnants of the poison of Unklar.

They had to enter the cloud....