Forbidden Book "Irafael"

This tome was written long before the Ancient War, and its existence was a closely guarded secret. They say it contains the secrets of powerful magic that nearly destroyed the world, and a way to open the gates to the netherworld. No one alive knows the truth of this, but one thing is for certain: no one must use this power. Simply possessing the book is enough to doom one to destruction; actually opening it would burn the reader to ashes, they say.