Once a murder has happened, to go back in time and prevent it might seriously mess with the timeline, and that is where the Time Patrol's Murder Squad comes in. They try not to kill anybody themselves, except in emergency defence of themselves or the timeline, but they are known as the Murder Squad because they are there to make sure the murders of the past happen.
Created in the far future, then sent through a temporal rift to the ancient past by the Chronomage Cara, the Circlet is an artefact designed to focus a mage’s energies when attempting to manipulate time.
The Hierophant of Greenmarch is a lycanthrope. Rather than seeking a cure, or hiding his condition, he considers it a blessing from the Goddess of the moon, and requires that all of the Druids and loyal Rangers of Greenmarch to share in his gift.