Adventure Title
Skull/Bone of (the) Circle/Ring/Obelisk/Column

Alternate title
Ghost/Spirit/Specter of the Forest

Opening Scene
A back alley that is Sprawling where they encounter Royalty that is/are Hostile

Plot hook and draw
A fanatical layperson that is/has Performed a dangerous ritual

Plot Concept
Protect a person or place that is motivated by Pure malice

Primary Antagonist
A pirate king or queen who/that is Obsessed

Plot fulfillment and location
Hidden knowledge from A concealed tomb