[x] You suppose you could use some of the heartsblood to cast a bloodline spell. Very efficient, especially with more isolated townships like this one. Given the catalyst, you could even make it one of those heart-rupturing curses. You've always wanted to try your hand at one of those.
The probability of offing somebody important as collateral damage seems worthwhile, to me. Besides, if any monarchs or governors have secret children in some out-of-the-way village, then it's going to be a clear and object lesson on the value of keeping it in your trousers.