Hidden room in Keep (spoilers)

[phil500]

So I read thru keep a week ago.

This line by mearls caught my eye today "Also, there's a secret room that you can find only by piecing together a few clues (or seriously dumb luck/thoroughness). No skill checks, just good, old fashioned brain processing power."

What are the clues he is talking about? what is the processing power?

Isnt it just a perception check to notice the imaginary wall?

 

[AntiStateQuixote]

So I read thru keep a week ago.

This line by mearls caught my eye today "Also, there's a secret room that you can find only by piecing together a few clues (or seriously dumb luck/thoroughness). No skill checks, just good, old fashioned brain processing power."

What are the clues he is talking about? what is the processing power?

Isnt it just a perception check to notice the imaginary wall?

Well, it's a LITTLE more than that:

1. Find the secret door to the room (Perception 20).
2. Figure out how to activate it (Thievery 25 or find the control panel in ceiling Perception 15).
3. Once inside detect the illusory wall. Perception 16 and Insight 22 give hints that something odd is going on with the wall, but they don't reveal the illusion outright. So even on success, PCs must take some action to pierce the illusion.
4. Defeat the guardians.
5. Solve a riddle to get treasure.

That's a lot of stuff crammed in to twenty 5' x 5' squares!