Lindon jumps into Mercy's spiritual space

“Mercy?”
“She still hasn’t woken up.”
Mercy had suffered significant spiritual injuries after the Wandering Titan had shattered her bloodline armor, but even the attention of Little Blue hadn’t been enough to restore her. Her madra channels were connected to her Book of Eternal Night in a unique way that Lindon still didn’t understand.
...
The tears had long dried on Mercy’s cheeks. She shivered as she pressed her body against the cold stone wall, trying to build up the courage to peek around the corner.
In fact, the wall wasn’t stone. It was more like condensed madra with properties like stone. Nothing in this spiritual space was real, physically speaking.
...
In the fifth page of the Book of Eternal Night. This whole place was built from shadow and nightmares, and the Dream of Darkness technique hung like mist in the air. Every time she let her guard down for an instant, her spirit was flogged with terror.
...
So when she fled, she trembled until fingers grabbed her.
Then she screamed.
“Oh! Apologies,” Lindon said.
She whipped her head around to stare at him in shock.
He was glancing around with open curiosity. “This is fascinating. I’d heard of spiritual spaces, and of course we’re here only in spirit, but it seems like it should be possible to enter this place in a body. Have you ever come here physically?”
“Lindon! Are you…real?”
The Dream of Darkness couldn’t be used to manually create illusions, but she had found that she had a hard time separating imagination from reality here. She’d hallucinated rescue before. But this felt very different.
“It’s just my soul, but I’m interested that we don’t look like Remnants. I wonder if this is an effect of our perception, or if the Book itself makes us look like we do on the outside.” He took a deep breath, as though savoring the scent of the cavern. “Dross would love it here.”
Out of habit, Mercy looked over her shoulder for her stalkers. She saw none, but she felt eyes on her from the shadows. Or at least she imagined she did.
“How did you get here?”
Lindon rubbed the back of his neck, and between the gesture and his size, he reminded her of her Uncle Fury.
“I do apologize; I was reluctant to interfere with the mechanism of a Divine Treasure created by a Monarch without Dross’ guidance, but you weren’t waking up.”

Reaper (Cradle Book 10)