Rival

Kill Broken Fang in the Bee Ravine and discuss the found thing with someone.

We're hungry. There were many food. But stone aliens came and kicked us out. Then another stone alien came and killed those who kicked us out. We saw that.
We didn't know where to go. We said - to the north. Broken Fang said to the west. We fought. Fang won. Now he's the leader.
Kill Fang. I will be the leader again. And I will give you the thing. You will like it.

Kill Fang. I don't like him.

A mask? This is curious... Why would an Architect wear a mask? They don't have faces, they don't even have identities.