Casting Bones - same as that used by witch doctors.
A hunting party realizes a druid has been foiling it’s hunting efforts and shifts it’s focus from hunting wild game to hunting the druid.
Sinister, enganging plot involves a powerful tool fallen into the wrong hands. Only the players can set things right. They have a piece of the tool, but first they have to figure out how the tool works, why two opposing forces are persuing them, whom to trust, and what to do next. Murder, accusation, betrayal, diplomacy, combat, and constant mystique force the players to make incredibly difficult decisions.
This powerful magic item was created to augment Alienists, a prestige class in the Tome and Blood.
Circlet of Amplus Ater Iris meaning “Circlet of The Great Dark Messenger” (Amplus - great, important; Ater - dark, malicious; Iris - messenger of the gods. Thought by some to mean Nyarlathotep)
When running a new party, get around the question of plot density by having the first discovery to be a deck of fate, or whatever you call it. If you use a real deck, you should definitely stack it to have the desired outcome, which is to curse the party to attract weird things to happen and involve them. This should not be told to the players at the time, so that they won't just up and try to get themselves 'decursed'. Though quite why they would want to is beyond me.