"Grendel is our father, the progenitor of all monsters. There is some discussion on what Grendel actually looks like. It matters not, for most undead see him as such, and most humanoids see him as such, and most chimera see him as such." Anuu says in a puzzled tone. "We still do not know exactly why. Racial bias, I assume."
Grendel gives us his Favor for completing certain tasks, such as killing uglies, or healing our fellow monsters. Each role has its ways, all sharing the killing of humans.
We use Grendel's Favor to improve our selves, to become more powerful with each kill!