I am now imagining something like An American Werewolf in London, but with writers.
Two men are hiking in the countryside. They’re attacked by a werewriter. One dies, and comes back as a ghost to warn the survivor to kill himself.
“You’ve got to do it, David! Kill yourself, or more characters will die!”
David, of course, does NOT kill himself, instead choosing to follow the old writing advice to “kill your darlings.”