Tricked

The 7th floor was framed by a great dome that projected a vast illusion deceiving the eye into believing there was more out there. Only an invisible blockade would await a challenger trying to cross that illusionary dome, though.

That floor was mostly composed of trees, grass, bushes, and dirt. It was surprisingly small compared to the 6th floor's desert area, averaging a diameter of 3km wide. At its center laid a glade where the moderator, Segolene, had installed a basic fortification for the challengers who would dare come here. 

An easy feat for her who could summon many things thanks to her moderator's rights. Although limited to a certain extent, she could create defensive structures, accommodations, and more. 

Challengers had the right to ask her to build one defensive structure, whatever it may be, to help them in their quest. Something Aito wasn't about to waste.