"There is always someone who will try to corrupt what is good and beatiful." He remembers this quote from a book, Will had read to him, during a time he couldn't rise from his bed.

For a moment his heart hammers. What if he asked Clary how to find them and he found a way to carry the knowledge home? He could use one wish, to put an end to Mortmain and save his family.

The thought died with a cough that splatters blood onto his hand. It was a pointless wish.