According to Krallak, this object appeared as a purple light in the sky above Delthrand. As it grew closer, he used his telescope and discovered there were horrifying creatures flying around it. It caused the “sky to explode”. Possibly the same thing as the Gods’ Hammer and Amenoth. Also possibly the spire that exploded when the group exited Tisthorrak’s lair.
From the Journal of Master Krallak
‘Something is wrong. No. Everything is wrong. The people have given the purple rock a name: the Heaven Rock. To them, it is not just an omen anymore, but the hand of the gods in physical form, coming to bring everyone eternal life, or some such rabble. It’s nonsense, all of it. Even my brothers are now caught up in the fervor. People are giving their wealth and homes away, and living in mud huts to sanctify their bodies with nature. Some people have formed flagellation cults, whipping and piercing themselves on sensitive parts of their bodies to experience their last moments of pain in life. And others have formed cults of sexual debauchery the likes of which I do not want to recall. The world has gone mad and that damn Heaven Rock comes ever closer. It is almost as big as the moon. How can it move as such speed? Less than half a year ago, it was only a tiny dot.’
‘We are all in danger. The Heaven Rock is not a blessing or eternal life. It is death and I cannot convince anyone. It is not slowing down. My brothers refuse to look through the telescope to see what I see. They think me a heretic and blasphemer. I have sinned by looking at the Heaven Rock with my sinful telescope. If it was not for Forshenill, I would be dead by now; hanged and my entrails wrapped around a tree. (Forshenill does not believe as the others do, but he is not as vocal about it as I am. I told him he should leave the monastery as soon as possible and find somewhere safe, before the Heaven Rock arrives.) To appease the gods and the Heaven Rock, my monk brothers have decided to break apart the telescope. It is almost worse than death. They have locked me in the observation tower with the broken remains of my life project, and I am helpless to stop them. But I fear it is all meaningless now. What I saw…. What were those flying horrifying monsters around the rock? The Heaven Rock will hit Delthrand in two days. I believe the coordinates will be 65.16/-0.57, between Syrill and Pyrenesse.’