Tower of Truth, 28th floor.
A flash of lightning, and a mage in black appeared on the street, but no one seemed to notice him.
"The content of this floor..."
Mike yawned and glanced at the prompt.
The 28th floor was also known as the [Non-Existent Floor].
Here, participants were invisible, like ghosts.
Most NPCs couldn't see the participants, hear them speak, or interact with them in any way.
Of course, no funny business was allowed on this floor.
Sneaking into the women's bathhouse, sneaking into the women's locker room, running naked on the street...
All forbidden.
Conquering the 28th floor involved two steps:
Step 1: Find an NPC who could 'see' you.
Step 2: Defeat the monsters and bosses conjured up by the NPC's imagination.
It was that simple.
For most participants, the difficulty lay in the first step.