The door swings open. You step inside, ready for another puzzle, be it cipher, maze, riddle, or mysterious signs. As you step into the room, which was [redacted], a screen comes to life. On it is:
I'm a messenger.
"Huh?" you say out loud. "What's that supposed to mean?"
As if in response to your question, the message on the screen changes.
I'm much like Clue Three, but faster.
Quickly, you pull out paper and pencil from your backpack as the message changes again.
My value is equal to a devoured 'E'.
I'm also the first, but two is greater.
And I'm used for both hot and cold.