Well, I found Spider Pig in world of warcraft. Sometimes he's invisible but after alot of Mind visioning him, i've finally found him. His home is under the ground, but he can attack u at the surface. And most of the time he's invisible, but spoke to GM, and he went for a dive and searched him, and I think I could see him at that moment, not sure.
And also got a GM joke to share to you guys <3