Limits?

	"The Wolf never told me the limits-maybe he didn't know himself. I avoided anything that would fully destroy my body like burning or being drawn and quartered."
	"And Curouch?"
	Durzo shot Kylar a sharp look. "A fatal blow from Curouch would blow apart the immortality magic. Jorsin feared the Devourer. He made sure there was at least one way to kill an immortal."

Beyond the Shadows, Chapter 60, pg. 411