Celestial Bronze/Imperial Gold vs Demigods

	"Imperial gold," Annabeth said, her voice quavering. "It’s deadly to demigods. It’s only a matter of time before –"
...
	He looked at the smoke curling from his bandages. He had worse things to worry about than blood loss. Annabeth was right about Imperial gold. The stuff was deadly to demigods as well as monsters. The wound from Varus’s blade would do its best to eat away at Jason’s life force.
	He’d seen a demigod die like that once before. It hadn’t been fast or pretty.
...
	"Some things even the gods cannot heal," she said. "This wound touches your soul as well as your body. You must fight it, Jason Grace … you must survive."
...
	A deep cut from Celestial bronze or Imperial gold could literally dissolve a demigod’s essence from the inside out.