1 Alvissa: Excuse me, sorry to bother you, but can you tell me if the great Dragon Sage Ardaxar is here somewhere?
1 Death of Insanely Overpowered Fireballs: OH YES, HE'S HERE.
2 Alvissa: Excellent! We may manage to finish this quest yet! Where can we find him?
2 Death of Insanely Overpowered Fireballs: YOU MUST CROSS THE FEATURELESS MOUNTAINS...
3 Death of Insanely Overpowered Fireballs: ... INTO THE GREAT INFINITE FEATURELESS EXPANSE OF TERROR AND SO TO THE FEATURELESS CITADEL...
4 Alvissa: I see.
4 Death of Insanely Overpowered Fireballs: I HAVEN'T EVEN TOLD YOU ABOUT THE FEATURELESS MAZE YET.

I reckon a featureless maze would be pretty difficult to navigate.

Or alternatively, trivially easy. But my money's on tricky.

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2021-10-23 Rerun commentary: If you want a real mindscrew with a featureless maze, read the short story In the Walls of Eryx by H. P. Lovecraft. Try to avoid spoilers before reading it. It's available in many Lovecraft short story collections.