Help me find the third book's title

The titles The Badness of Ballydog and Lost Dogs were both dreamed up in minutes. But the search for the title for the third and final book of the trilogy has been going on for months. So now I am asking for any ideas you might have. I would welcome and appreciate any suggestions.


The setting looks a bit like this

The last book is set in a valley high in a Northern Irish mountain range. In the valley is a lake with a village by its shore. The village is the opposite of Ballydog. Their community is a utopia, everyone is sweetness and light. The citizens are all blessed with long and contented lives. But they have a secret, revealed early in the plot. The lake is home to a monster.

Here are some titles I like, although not quite enough:

Last Days of Legend
Trial by Water
The Last Days of Lough Linger
Dark Water
Monster Rise
Human Soup
Lost Soul Lake

You could build on any of the above or be original. No suggestion too crazy. There’s a prize for the winner. Not sure what yet.