Demons

Seems like ages but you've actually been here all along.
I love the twist of irony at the end. You build up a modest threat, a warning as it were, about your capacity for violence. At the same time you depict yourself as a Cassandra whose warnings go unheeded until doom descends.
Then the final line blows the whole premise away and you walk away with a smug look on your face.
Well done indeed.