Political event
In Britain, demonic priest Blackbriar Thorn is hunted by Roman legions, and finally buried alive in battle with his fellow Druids.
When the Roman Empire expands into Britannia, it undertakes a campaign to destroy local druidic cults engaging in the sacrifice of innocent blood. Attacking the largest during their most important ritual at Stonehenge, the Romans nearly succeed in destroying the cult except for its leader, who slips into the nearby woods and takes on a disguise by transforming himself into living wood and ends up buried until the 20th century, when he is revived and harries the heroes of the modern day as Blackbriar Thorn.