Just to let you know, the thing that speaks to you from the giant hole next to the hook horrors is indeed the Bulette. If it is dead you get no response from the hole, but still hear the sound. You also need speak with animals up to interact with it, if it is still alive. Great content BTW. Just entered Act 2 on my first honour mode run. I'm terrified of the new Myrkul.
Yeah I did a test fight with Myrkul today. Took me an hour with a wizard build. The man's insane now!! Also thanks for the bulette information, I will check it out.