True Believers: King in Black - Black Knight #1

Synopsis

Quicksilver escapes from Magneto long enough to alert the Avengers, but he is recaptured. Dane Whitman recalls the death of his uncle, the villainous Black Knight, as he prepares to become the new Black Knight to fight Magneto himself. But when he meets the Avengers, they attack him, not knowing that this new Black Knight is on their side. Meanwhile, in Olympus, Hercules finds that the gods are missing and the Promethean Flame has been extinguished.