So I was just doing patrol missions for a bounty. I was in the area where the entrance to the Omnigul strike was, the one with the giant hive pillar and where a Blade of Crota usually drops. I went into the nearby cave checking for a chest, when it gave me a button option. It said, "Disturb The Remains". I pressed X, and quiet whispers started all around me. They got even louder, when a voice said, "These remains are not enough for master Rauhl." I was terrified at that point, and immediately left the small cave. After that, a notification appeared that said, "enemy forces anger" or something around that, and a ton of hive and fallen came into the area to fight. Then, I killed a hive that came out of the cave. It dropped the Husk of The Pit, which its perk is also disturbing. It would be great if someone looked into this, because I'm sure there's more behind this.