Ran into a problem that I could only laugh at after my efforts because of the ridiculousness of it. Was running duo, we defeated Ecthar, then I proceeded to triumphantly crush his ghost so I could get my sweet, sweet loot....however instead of loot, I got stomped and launched into the ceiling because instead of him dying, he INSTANTLY respawned where my hand was when I crushed his stupid, weird, overly aggressive ghost had been. It was during my trip to the ceiling we learned not only was he back, he was back with a capital B and an explanation mark and completely immune and un-killable. All ads were de-spawned, deepsight gone, runes a distant memory. If I hadn't spent an hour doing this endless mob control comprised of 3K+ kills I wouldn't be here wasting my time, but this dungeon boss encounter is on a different level with endless waves of super aggressive enemies. Seriously, you'd think that a mechanic of such importance would have at least 4-5 most likely scenarios play tested and completely accounted for. Simple quality checks, for very common scenarios would resolve so many of the issues we run into without them evolving into the HUGE problems most become. Thanks Bungie!