Locke & Key. Volume 6. Alpha and Omega

Shout at the sight of the Black Door.
Taking the form of little Bodie Locke, Dodge descends into the Drowning Cave to release the demons waiting on the other side. One hundred feet beneath the House of Keys, on the brink of evil that has been locked away by several generations of Lockes, lies countless victims. And the great confrontation of human decency and inhuman hatred.