"I've got the Mark of Cain," said Simon. "That means nothing can kill me, right?"
"You can kill yourself," Magnus said, somewhat unhelpfully. "As far as I know, inanimate objects can accidentally kill you. So if you were planning on teaching yourself the lambada on a greased platform over a pit full of knives, I wouldn't."
"There goes my Saturday."
― Cassandra Clare, City of Lost Souls