As told by Ploon Kloovs:
Passing from the Infinite Staircase, we arrived in an underground chamber somewhere on Arcadia. It turned out we had entered the realm of some Formians, who were under some sort of strange lethargy. Worse by far, we found a poor, defenseless Gnome from Bytopia, affected in the same way. I took him back to the Infinite Staircase, and he soon improved, so the mission was a complete success.
We carried on anyway, and saved the Formians from a Bariaur disguised as their ‘king’.