[ All this time, and Five still hasn't pinned down exactly what Lan Wangji's powers entail. He knows it's something. He remembers, very distinctly, when he was able to transfer some of his energy after being poisoned in Taravast. He's certainly seen him fight enough to know his skills, but his power over the dead has always been questionable. Or at the very least, impractical.

Say what he might about Klaus, but for all his lack of discipline, his brother might have been able to summon one spirit they could get answers from. He'd even leave out the moral bellyaching. ]

The obvious. These were stacked here either as a warning, or to mislead us. Considering the maze, it could be part of how they intend to torture people who get stuck here looking for a way out.