TOPIC: E3.6 Puzzle Room - Spoilers and Solution Discussion

Matthew Hayward wrote: Spoilers below, obviously - I'm curious about the solution to this puzzle.

The room I'm thinking of was the one with skulls embedded in the wall with glowing eyes.

Warning: Spoiler! [ Click to expand ] [ Click to hide ]

Each eye was either solid red, or had a black circle (dot) or a black hyphen (dash).

There was a banner over the door saying:

"Use Key to Open"

Each letter on the banner had either 0, 1, or 2 triangles inside it. The triangles were either small or large.

We figured one of the triangles meant a dot, and one meant a dash, and none meant a solid red eye.

Based on this we matched up each skull to one of the letters E, K, N, O, P, S, T, U, Y.

We then tried a few things, like touching the skulls to spell out "Key," or the whole "Use Key to Open" phrase.

We never got it, the DM said something like: "You've done a good job associating the letters with the skulls, but something is missing."

Any idea what the solution was here?