Geas

When in the hell is this guy going to get his house back? It's been like a thousand years since the nibblers took over.

Nibblers are worse than cockroaches. One time, Matusalem stunned every nibbler, captured them alive, and relocated them to the mountains. They returned to the house before he was even finished.

He gets it back many times but the nibblers rebound and kick him out again.

It is one of the ancient wars.

One time I think a wizard was having some fun and Luminier was attacked by thirty plus nibblers at once. That was good.

A nibbler suicide mission?