As for the ones whom he had used their blood to control and make them snap their necks, he simply removed the magic power that was inside their blood, reabsorbing it, allowing their blood to return to being their own, as well as releasing the command that made their bodies hold their necks at odd angles even while they were unconscious.
Snapping the neck of a vampire, while not enough to kill them, could incapacitate them for a while.
Jamie had done that by making these Vampire Kings snap their necks and commanding their unconscious bodies to hold their broken necks at odd angles so they didn't snap back in place and heal.
Now, the moment they let go, their necks snapped back in place, and within seconds, all of those Vampire Kings began jerking back to consciousness.
When they awakened, all of them reacted with varying levels of shock at the devastated area around them that showed clear signs of a battle.
