The events of the Innistrad block center on the events after the sundering of the Helvault, a giant chunk of silver metal that was used by the archangel Avacyn to imprison Innistrad's worst horrors, the demons. It is then revealed why the archangel Avacyn vanished from the plane in the first place, leaving the humans of the plane defenseless against the gothic horrors of Innistrad.
