So I was on Patrol in Dreadnought and killing hive by the court. I then saw a glowing symbols with essence floating in the air. After killing the hive by it is went under the symbol and could hear hive chanting. I went into the next area and saw one hive praying. I killed him and a few in the area and went back and the glowing symbols was not there anymore? I should have screen shot it for a better description. Anyone know what it is? I can't find anything online about it.