Take dead leaves and dead plants put them in a container, Then make a wire from twig. Put the wig partly in the container with dirt all around it. And when the monster is eating spark the rocks light the twig and 3...2...1...BOOM! Bye-Bye monster^^
Warning: This would only work in my mind :D
“It may not mean anything to you, But try to hear me through, You're beautiful”(: