Originally posted by LordKaos
The point being it was caused by collapsing, what you said about the crystal was not refuted. If it was caused by the crystal then it could not have been caused by the Phoenix. Since when are the white hot room and M'kraan the same? If they were then why did it try to keep Phoenix out when it need repairing? You'd figure if they were the same then she would have the keys and security code to her house. The only reason she could enter was because the nightmare effect had no effect on her because she had already overcome her fear of dying.
Read my posts again, carefully this time and you'll see i said Phoenix brings about the end via the M'kraan crystal. You saw Rachel threatening to do this in Uncanny X-men 203 for example.
Again if you carefully read the description of the process in which the crystal brings about the end, you'll see the gravity well of the neutron galaxy causes all reality to collapse into a singularity. You see my friend it all fits in perfectly. For more info check out Uncanny X-men 108. Regardless the title wherein the M'kraan C destroyed the last universe is supported in the latest bio.
The white hot room and the crystal were revealed to be the same thing in New X-men 154. The crystal i believe is an access point to the white hot room.
The crystal was malfunctioning and whilst its defences attacked her at the same time her nature as a Phoenix (her being used to death as a part of her life cycle) meant that its defences had no effect on her. Furthermore it was stated on panel that very issue that she felt she was connected to the crystal somehow. It was until many years later that we found out it was an entrance to the white hot room.