The sinister Darkhold first appeared on screen in Marvel's WANDAVISION, and returns to menace the MCU in AGATHA ALL ALONG, now streaming on Disney+ Learn the hidden history of Marvel's most terrifying tome Penned by the elder god Chthon and containing the blackest of magic, the Darkhold is the most dangerous book in the Marvel Universe And it may just be responsible for the terrible curse that afflicts Jack Russell, the Werewolf by...