The reincarnated person "Sarah" mentioned before probably isn't garralosh is she? Because garralosh is pretty old but I forget when Sarah was supposed to have gone down after meeting with the troglodytes...
They're probably stopping her from going down and becoming one of the Ancients she spoke about, it would probably give her children much more power, which the Legion is trying to stop. At least that's my guess.
So the legion is the great villain of the novel, because of her garralosh is attacking to superficial and they abandoned the superficie, if garralosh reach there I think she can destroy everything and this is what the legions is supposed to defend...
I believe Sarah the other reincarnator was 60-70 years old so don’t think she is this one as it said it is hundreds of years old. Also do I sense a boss battle coming up for our mc.
garalosh on the surface taking revenge against the legion by killing the human cities welp you done ****ed up legion should not have angered the giant murder monster
So... I'm guessing the whole "needs to be insane" reincarnation thing gandolf was talking about is a bit extreme with mc lizard. Less anti-social, lack of survival instincts Anthony and more murderous psychopath.