Not really. Eris’s rock is just that, a rock. Eris once had an Ahamkara bone on the moon, but she only [i]used[/i] it there. She had it before coming there. There is a lore entry which details Eris and Ikora slaughtering a bunch of Ahamkara. She secretly takes a bone at the end, if I remember correctly. It’s pretty safe to assume that her bone came from that incident, since both lore entries come from the Last Wish armor. She used the bone to make a wish. She was lost in the tunnels of the moon, without a ghost. She wished to know the way out, but it cost her her eyesight. The giant skeletons in the tunnels of the moon are from yet unseen wormlike Hive creatures, that were used to tunnel through the moon. And lastly: Nezarec likely has nothing to do with the Darkness, at all. He is related to a [b]pre-golden-age[/b] cult. That was before the Traveler came to us, before anyone even knew what was out there.