Was working on my hero AI when I realised my implementation of 'Creatures' was a little wonky and too vague to work with the system I'm making. Now the scheme places a broodmother entity that will periodically birth broodlings, adding a broodling feature that will do much the same thing as the generic 'Creatures'. Patrols can kill them off and actually clear the broodlings as a feature on their own, but the broodmother will continue to produce more until a hero goes in and kills her. I'd like to do more with this, like maybe the broodlings bring her back food and that boosts her reproductive abilities, and/or makes her more dangerous to heroes trying to find and kill her. But I probably shouldn't get any more sidetracked.