rot magic doesn't work on inorganics

She listened for Sorin to begin climbing. Why had his destructive singing not worked on the giants?

She asked him.

“They must be composed,” he said, breathing hard as he climbed. “Must be composed of stone. I am only able to rot the living.”

Nissa turned back to climbing. Rot the living, she thought. She tried to speed up so Sorin was not so close behind her.

***

In the Teeth of Akoum, Chapter 6