As Arthur stared at the corridor he encountered at the start of the final dungeon exam, a bitter laugh escaped him.

What on earth was I doing inside that dungeon?

How distracted was I to have missed all those clues right in front of me?

Without concern for the stares around him, Arthur covered his face with his hand, mentally retracing each clue Lucy had pointed out just moments before.

An intact ceiling.

Windows with no view outside.

A faded portrait with an impossible date below it.

A broken clock.

Each of the countless hints Lucy had indicated was meticulously …