Thank you! Not to necro an old thread, but this still works, and the googles did nothing on searching for it. I think I had to go through two or three threads on the forum before finding this. I'm not sure what happened for me, when I got to the top of the Devastation Tower, the Mad Crow was nowhere to be seen. After restarting the game, waiting 10-15min, leaving the area, sleeping and coming back, etc. Nothing worked. Going back to the top, then running that command spawned Erel in a few seconds. I saw other mentions of her flying away at 50% health but I had to take her down to 5% before she flew off and I could pick up the Lens.