THE FALL OF ALL-FATHER THOR! Valkyrie and Thor have discovered a vast and terrible secret buried deep in the Earth, one that has haunted Asgard for eons. The Røkkva, a magic older than the gods, has broken free from its long prison. And one man seeks to turn it to his own gain. He just needs to get rid of Valkyrie first — and what better way than at the hands of Thor?!