“You’re a liar,” said the girl with golden hair. “You lie to keep us in check. You lie about the fish people to keep us here, so we won’t try to escape down the river. And you lie about the mountains, so we won’t go there, either. You lie about the blood tax being integral to the wealth of the city. What could you possibly use the blood for?”
Then there's the sparrow you set to chirping an alert whenever someone approaches your suite from the palace courtyard. After several days, it falls to the ground and is no doubt claimed by some hungry scavenger. It had too diminutive a mind to realize it could serve you longer by taking time to eat and sleep.